1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 96, 1998
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
27 /* This file is split into two parts by the following preprocessor
28 conditional. The 'then' clause contains all of the support for
29 asynchronous subprocesses. The 'else' clause contains stub
30 versions of some of the asynchronous subprocess routines that are
31 often called elsewhere in Emacs, so we don't have to #ifdef the
32 sections that call them. */
40 #include <sys/types.h> /* some typedefs are used in sys/file.h */
50 #endif /* not WINDOWSNT */
52 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
53 #include <sys/socket.h>
55 #include <netinet/in.h>
56 #include <arpa/inet.h>
57 #ifdef NEED_NET_ERRNO_H
58 #include <net/errno.h>
59 #endif /* NEED_NET_ERRNO_H */
60 #endif /* HAVE_SOCKETS */
62 /* TERM is a poor-man's SLIP, used on Linux. */
67 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
68 #ifdef HAVE_BROKEN_INET_ADDR
69 #define IN_ADDR struct in_addr
70 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
72 #define IN_ADDR unsigned long
73 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
76 #if defined(BSD_SYSTEM) || defined(STRIDE)
77 #include <sys/ioctl.h>
78 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
80 #endif /* HAVE_PTYS and no O_NDELAY */
81 #endif /* BSD_SYSTEM || STRIDE */
83 #ifdef BROKEN_O_NONBLOCK
85 #endif /* BROKEN_O_NONBLOCK */
92 #include <sys/sysmacros.h> /* for "minor" */
104 #include "termhooks.h"
105 #include "termopts.h"
106 #include "commands.h"
108 #include "blockinput.h"
109 #include "keyboard.h"
110 #include "dispextern.h"
112 #define max(a, b) ((a) > (b) ? (a) : (b))
114 Lisp_Object Qprocessp
;
115 Lisp_Object Qrun
, Qstop
, Qsignal
, Qopen
, Qclosed
;
116 Lisp_Object Qlast_nonmenu_event
;
117 /* Qexit is declared and initialized in eval.c. */
119 /* a process object is a network connection when its childp field is neither
120 Qt nor Qnil but is instead a cons cell (HOSTNAME PORTNUM). */
123 #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp))
125 #define NETCONN_P(p) 0
126 #endif /* HAVE_SOCKETS */
128 /* Define first descriptor number available for subprocesses. */
130 #define FIRST_PROC_DESC 1
132 #define FIRST_PROC_DESC 3
135 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
138 #if !defined (SIGCHLD) && defined (SIGCLD)
139 #define SIGCHLD SIGCLD
142 #include "syssignal.h"
147 extern char *strerror ();
149 extern char *sys_errlist
[];
156 #ifndef SYS_SIGLIST_DECLARED
161 extern char *sys_siglist
[];
162 #endif /* not LINUX */
164 char *sys_siglist
[] =
170 "illegal instruction",
174 "floating point exception",
177 "segmentation violation",
178 "bad argument to system call",
179 "write on a pipe with no one to read it",
181 "software termination signal from kill",
183 "sendable stop signal not from tty",
184 "stop signal from tty",
185 "continue a stopped process",
186 "child status has changed",
187 "background read attempted from control tty",
188 "background write attempted from control tty",
189 "input record available at control tty",
190 "exceeded CPU time limit",
191 "exceeded file size limit"
193 #endif /* not WINDOWSNT */
196 #endif /* ! SYS_SIGLIST_DECLARED */
198 /* t means use pty, nil means use a pipe,
199 maybe other values to come. */
200 static Lisp_Object Vprocess_connection_type
;
204 #include <sys/socket.h>
208 /* These next two vars are non-static since sysdep.c uses them in the
209 emulation of `select'. */
210 /* Number of events of change of status of a process. */
212 /* Number of events for which the user or sentinel has been notified. */
215 #include "sysselect.h"
217 /* If we support a window system, turn on the code to poll periodically
218 to detect C-g. It isn't actually used when doing interrupt input. */
219 #ifdef HAVE_WINDOW_SYSTEM
220 #define POLL_FOR_INPUT
223 /* Mask of bits indicating the descriptors that we wait for input on. */
225 static SELECT_TYPE input_wait_mask
;
227 /* Mask that excludes keyboard input descriptor (s). */
229 static SELECT_TYPE non_keyboard_wait_mask
;
231 /* Mask that excludes process input descriptor (s). */
233 static SELECT_TYPE non_process_wait_mask
;
235 /* The largest descriptor currently in use for a process object. */
236 static int max_process_desc
;
238 /* The largest descriptor currently in use for keyboard input. */
239 static int max_keyboard_desc
;
241 /* Nonzero means delete a process right away if it exits. */
242 static int delete_exited_processes
;
244 /* Indexed by descriptor, gives the process (if any) for that descriptor */
245 Lisp_Object chan_process
[MAXDESC
];
247 /* Alist of elements (NAME . PROCESS) */
248 Lisp_Object Vprocess_alist
;
250 /* Buffered-ahead input char from process, indexed by channel.
251 -1 means empty (no char is buffered).
252 Used on sys V where the only way to tell if there is any
253 output from the process is to read at least one char.
254 Always -1 on systems that support FIONREAD. */
256 /* Don't make static; need to access externally. */
257 int proc_buffered_char
[MAXDESC
];
259 /* Table of `struct coding-system' for each process. */
260 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
261 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
263 static Lisp_Object
get_process ();
265 extern EMACS_TIME
timer_check ();
266 extern int timers_run
;
268 /* Maximum number of bytes to send to a pty without an eof. */
269 static int pty_max_bytes
;
271 extern Lisp_Object Vfile_name_coding_system
, Vdefault_file_name_coding_system
;
274 /* The file name of the pty opened by allocate_pty. */
276 static char pty_name
[24];
279 /* Compute the Lisp form of the process status, p->status, from
280 the numeric status that was returned by `wait'. */
282 Lisp_Object
status_convert ();
286 struct Lisp_Process
*p
;
288 union { int i
; WAITTYPE wt
; } u
;
289 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
290 p
->status
= status_convert (u
.wt
);
291 p
->raw_status_low
= Qnil
;
292 p
->raw_status_high
= Qnil
;
295 /* Convert a process status word in Unix format to
296 the list that we use internally. */
303 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
304 else if (WIFEXITED (w
))
305 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
306 WCOREDUMP (w
) ? Qt
: Qnil
));
307 else if (WIFSIGNALED (w
))
308 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
309 WCOREDUMP (w
) ? Qt
: Qnil
));
314 /* Given a status-list, extract the three pieces of information
315 and store them individually through the three pointers. */
318 decode_status (l
, symbol
, code
, coredump
)
334 *symbol
= XCONS (l
)->car
;
335 tem
= XCONS (l
)->cdr
;
336 *code
= XFASTINT (XCONS (tem
)->car
);
337 tem
= XCONS (tem
)->cdr
;
338 *coredump
= !NILP (tem
);
342 /* Return a string describing a process status list. */
345 status_message (status
)
350 Lisp_Object string
, string2
;
352 decode_status (status
, &symbol
, &code
, &coredump
);
354 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
360 /* Cast to suppress warning if the table has const char *. */
361 signame
= (char *) sys_siglist
[code
];
363 signame
= sys_errlist
[code
];
368 string
= build_string (signame
);
369 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
370 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
371 return concat2 (string
, string2
);
373 else if (EQ (symbol
, Qexit
))
376 return build_string ("finished\n");
377 string
= Fnumber_to_string (make_number (code
));
378 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
379 return concat2 (build_string ("exited abnormally with code "),
380 concat2 (string
, string2
));
383 return Fcopy_sequence (Fsymbol_name (symbol
));
388 /* Open an available pty, returning a file descriptor.
389 Return -1 on failure.
390 The file name of the terminal corresponding to the pty
391 is left in the variable pty_name. */
400 /* Some systems name their pseudoterminals so that there are gaps in
401 the usual sequence - for example, on HP9000/S700 systems, there
402 are no pseudoterminals with names ending in 'f'. So we wait for
403 three failures in a row before deciding that we've reached the
405 int failed_count
= 0;
410 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
411 for (i
= 0; i
< 16; i
++)
414 #ifdef PTY_NAME_SPRINTF
417 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
418 #endif /* no PTY_NAME_SPRINTF */
422 #else /* no PTY_OPEN */
424 /* Unusual IRIS code */
425 *ptyv
= open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
428 if (fstat (fd
, &stb
) < 0)
431 if (stat (pty_name
, &stb
) < 0)
434 if (failed_count
>= 3)
440 fd
= open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
442 fd
= open (pty_name
, O_RDWR
| O_NDELAY
, 0);
444 #endif /* not IRIS */
445 #endif /* no PTY_OPEN */
449 /* check to make certain that both sides are available
450 this avoids a nasty yet stupid bug in rlogins */
451 #ifdef PTY_TTY_NAME_SPRINTF
454 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
455 #endif /* no PTY_TTY_NAME_SPRINTF */
457 if (access (pty_name
, 6) != 0)
460 #if !defined(IRIS) && !defined(__sgi)
466 #endif /* not UNIPLUS */
473 #endif /* HAVE_PTYS */
479 struct Lisp_Vector
*vec
;
480 register Lisp_Object val
, tem
, name1
;
481 register struct Lisp_Process
*p
;
485 vec
= allocate_vectorlike ((EMACS_INT
) VECSIZE (struct Lisp_Process
));
486 for (i
= 0; i
< VECSIZE (struct Lisp_Process
); i
++)
487 vec
->contents
[i
] = Qnil
;
488 vec
->size
= VECSIZE (struct Lisp_Process
);
489 p
= (struct Lisp_Process
*)vec
;
491 XSETINT (p
->infd
, -1);
492 XSETINT (p
->outfd
, -1);
493 XSETFASTINT (p
->pid
, 0);
494 XSETFASTINT (p
->tick
, 0);
495 XSETFASTINT (p
->update_tick
, 0);
496 p
->raw_status_low
= Qnil
;
497 p
->raw_status_high
= Qnil
;
499 p
->mark
= Fmake_marker ();
501 /* If name is already in use, modify it until it is unused. */
506 tem
= Fget_process (name1
);
507 if (NILP (tem
)) break;
508 sprintf (suffix
, "<%d>", i
);
509 name1
= concat2 (name
, build_string (suffix
));
513 XSETPROCESS (val
, p
);
514 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
519 remove_process (proc
)
520 register Lisp_Object proc
;
522 register Lisp_Object pair
;
524 pair
= Frassq (proc
, Vprocess_alist
);
525 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
527 deactivate_process (proc
);
530 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
531 "Return t if OBJECT is a process.")
535 return PROCESSP (object
) ? Qt
: Qnil
;
538 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
539 "Return the process named NAME, or nil if there is none.")
541 register Lisp_Object name
;
545 CHECK_STRING (name
, 0);
546 return Fcdr (Fassoc (name
, Vprocess_alist
));
549 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
550 "Return the (or, a) process associated with BUFFER.\n\
551 BUFFER may be a buffer or the name of one.")
553 register Lisp_Object buffer
;
555 register Lisp_Object buf
, tail
, proc
;
557 if (NILP (buffer
)) return Qnil
;
558 buf
= Fget_buffer (buffer
);
559 if (NILP (buf
)) return Qnil
;
561 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
563 proc
= Fcdr (Fcar (tail
));
564 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
570 /* This is how commands for the user decode process arguments. It
571 accepts a process, a process name, a buffer, a buffer name, or nil.
572 Buffers denote the first process in the buffer, and nil denotes the
577 register Lisp_Object name
;
579 register Lisp_Object proc
, obj
;
582 obj
= Fget_process (name
);
584 obj
= Fget_buffer (name
);
586 error ("Process %s does not exist", XSTRING (name
)->data
);
588 else if (NILP (name
))
589 obj
= Fcurrent_buffer ();
593 /* Now obj should be either a buffer object or a process object.
597 proc
= Fget_buffer_process (obj
);
599 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
603 CHECK_PROCESS (obj
, 0);
609 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
610 "Delete PROCESS: kill it and forget about it immediately.\n\
611 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
612 nil, indicating the current buffer's process.")
614 register Lisp_Object process
;
616 process
= get_process (process
);
617 XPROCESS (process
)->raw_status_low
= Qnil
;
618 XPROCESS (process
)->raw_status_high
= Qnil
;
619 if (NETCONN_P (process
))
621 XPROCESS (process
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
622 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
624 else if (XINT (XPROCESS (process
)->infd
) >= 0)
626 Fkill_process (process
, Qnil
);
627 /* Do this now, since remove_process will make sigchld_handler do nothing. */
628 XPROCESS (process
)->status
629 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
630 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
633 remove_process (process
);
637 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
638 "Return the status of PROCESS: a symbol, one of these:\n\
639 run -- for a process that is running.\n\
640 stop -- for a process stopped but continuable.\n\
641 exit -- for a process that has exited.\n\
642 signal -- for a process that has got a fatal signal.\n\
643 open -- for a network stream connection that is open.\n\
644 closed -- for a network stream connection that is closed.\n\
645 nil -- if arg is a process name and no such process exists.\n\
646 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
647 nil, indicating the current buffer's process.")
649 register Lisp_Object process
;
651 register struct Lisp_Process
*p
;
652 register Lisp_Object status
;
654 if (STRINGP (process
))
655 process
= Fget_process (process
);
657 process
= get_process (process
);
662 p
= XPROCESS (process
);
663 if (!NILP (p
->raw_status_low
))
667 status
= XCONS (status
)->car
;
668 if (NETCONN_P (process
))
670 if (EQ (status
, Qrun
))
672 else if (EQ (status
, Qexit
))
678 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
680 "Return the exit status of PROCESS or the signal number that killed it.\n\
681 If PROCESS has not yet exited or died, return 0.")
683 register Lisp_Object process
;
685 CHECK_PROCESS (process
, 0);
686 if (!NILP (XPROCESS (process
)->raw_status_low
))
687 update_status (XPROCESS (process
));
688 if (CONSP (XPROCESS (process
)->status
))
689 return XCONS (XCONS (XPROCESS (process
)->status
)->cdr
)->car
;
690 return make_number (0);
693 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
694 "Return the process id of PROCESS.\n\
695 This is the pid of the Unix process which PROCESS uses or talks to.\n\
696 For a network connection, this value is nil.")
698 register Lisp_Object process
;
700 CHECK_PROCESS (process
, 0);
701 return XPROCESS (process
)->pid
;
704 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
705 "Return the name of PROCESS, as a string.\n\
706 This is the name of the program invoked in PROCESS,\n\
707 possibly modified to make it unique among process names.")
709 register Lisp_Object process
;
711 CHECK_PROCESS (process
, 0);
712 return XPROCESS (process
)->name
;
715 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
716 "Return the command that was executed to start PROCESS.\n\
717 This is a list of strings, the first string being the program executed\n\
718 and the rest of the strings being the arguments given to it.\n\
719 For a non-child channel, this is nil.")
721 register Lisp_Object process
;
723 CHECK_PROCESS (process
, 0);
724 return XPROCESS (process
)->command
;
727 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
728 "Return the name of the terminal PROCESS uses, or nil if none.\n\
729 This is the terminal that the process itself reads and writes on,\n\
730 not the name of the pty that Emacs uses to talk with that terminal.")
732 register Lisp_Object process
;
734 CHECK_PROCESS (process
, 0);
735 return XPROCESS (process
)->tty_name
;
738 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
740 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
742 register Lisp_Object process
, buffer
;
744 CHECK_PROCESS (process
, 0);
746 CHECK_BUFFER (buffer
, 1);
747 XPROCESS (process
)->buffer
= buffer
;
751 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
753 "Return the buffer PROCESS is associated with.\n\
754 Output from PROCESS is inserted in this buffer\n\
755 unless PROCESS has a filter.")
757 register Lisp_Object process
;
759 CHECK_PROCESS (process
, 0);
760 return XPROCESS (process
)->buffer
;
763 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
765 "Return the marker for the end of the last output from PROCESS.")
767 register Lisp_Object process
;
769 CHECK_PROCESS (process
, 0);
770 return XPROCESS (process
)->mark
;
773 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
775 "Give PROCESS the filter function FILTER; nil means no filter.\n\
776 t means stop accepting output from the process.\n\
777 When a process has a filter, each time it does output\n\
778 the entire string of output is passed to the filter.\n\
779 The filter gets two arguments: the process and the string of output.\n\
780 If the process has a filter, its buffer is not used for output.")
782 register Lisp_Object process
, filter
;
784 CHECK_PROCESS (process
, 0);
787 FD_CLR (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
788 FD_CLR (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
790 else if (EQ (XPROCESS (process
)->filter
, Qt
))
792 FD_SET (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
793 FD_SET (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
795 XPROCESS (process
)->filter
= filter
;
799 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
801 "Returns the filter function of PROCESS; nil if none.\n\
802 See `set-process-filter' for more info on filter functions.")
804 register Lisp_Object process
;
806 CHECK_PROCESS (process
, 0);
807 return XPROCESS (process
)->filter
;
810 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
812 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
813 The sentinel is called as a function when the process changes state.\n\
814 It gets two arguments: the process, and a string describing the change.")
816 register Lisp_Object process
, sentinel
;
818 CHECK_PROCESS (process
, 0);
819 XPROCESS (process
)->sentinel
= sentinel
;
823 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
825 "Return the sentinel of PROCESS; nil if none.\n\
826 See `set-process-sentinel' for more info on sentinels.")
828 register Lisp_Object process
;
830 CHECK_PROCESS (process
, 0);
831 return XPROCESS (process
)->sentinel
;
834 DEFUN ("set-process-window-size", Fset_process_window_size
,
835 Sset_process_window_size
, 3, 3, 0,
836 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
837 (process
, height
, width
)
838 register Lisp_Object process
, height
, width
;
840 CHECK_PROCESS (process
, 0);
841 CHECK_NATNUM (height
, 0);
842 CHECK_NATNUM (width
, 0);
843 if (set_window_size (XINT (XPROCESS (process
)->infd
),
844 XINT (height
), XINT(width
)) <= 0)
850 DEFUN ("set-process-inherit-coding-system-flag",
851 Fset_process_inherit_coding_system_flag
,
852 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
853 "Determine whether buffer of PROCESS will inherit coding-system.\n\
854 If the second argument FLAG is non-nil, then the variable\n\
855 `buffer-file-coding-system' of the buffer associated with PROCESS\n\
856 will be bound to the value of the coding system used to decode\n\
857 the process output.\n\
859 This is useful when the coding system specified for the process buffer\n\
860 leaves either the character code conversion or the end-of-line conversion\n\
861 unspecified, or if the coding system used to decode the process output\n\
862 is more appropriate for saving the process buffer.\n\
864 Binding the variable `inherit-process-coding-system' to non-nil before\n\
865 starting the process is an alternative way of setting the inherit flag\n\
866 for the process which will run.")
868 register Lisp_Object process
, flag
;
870 CHECK_PROCESS (process
, 0);
871 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
875 DEFUN ("process-inherit-coding-system-flag",
876 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
878 "Return the value of inherit-coding-system flag for PROCESS.\n\
879 If this flag is t, `buffer-file-coding-system' of the buffer\n\
880 associated with PROCESS will inherit the coding system used to decode\n\
881 the process output.")
883 register Lisp_Object process
;
885 CHECK_PROCESS (process
, 0);
886 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
889 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
890 Sprocess_kill_without_query
, 1, 2, 0,
891 "Say no query needed if PROCESS is running when Emacs is exited.\n\
892 Optional second argument if non-nil says to require a query.\n\
893 Value is t if a query was formerly required.")
895 register Lisp_Object process
, value
;
899 CHECK_PROCESS (process
, 0);
900 tem
= XPROCESS (process
)->kill_without_query
;
901 XPROCESS (process
)->kill_without_query
= Fnull (value
);
906 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
908 "Return the contact info of PROCESS; t for a real child.\n\
909 For a net connection, the value is a cons cell of the form (HOST SERVICE).")
911 register Lisp_Object process
;
913 CHECK_PROCESS (process
, 0);
914 return XPROCESS (process
)->childp
;
917 #if 0 /* Turned off because we don't currently record this info
918 in the process. Perhaps add it. */
919 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
920 "Return the connection type of `PROCESS'.\n\
921 The value is `nil' for a pipe,\n\
922 `t' or `pty' for a pty, or `stream' for a socket connection.")
926 return XPROCESS (process
)->type
;
933 register Lisp_Object tail
, tem
;
934 Lisp_Object proc
, minspace
, tem1
;
935 register struct buffer
*old
= current_buffer
;
936 register struct Lisp_Process
*p
;
940 XSETFASTINT (minspace
, 1);
942 set_buffer_internal (XBUFFER (Vstandard_output
));
943 Fbuffer_disable_undo (Vstandard_output
);
945 current_buffer
->truncate_lines
= Qt
;
948 Proc Status Buffer Tty Command\n\
949 ---- ------ ------ --- -------\n", -1);
951 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
955 proc
= Fcdr (Fcar (tail
));
957 if (NILP (p
->childp
))
960 Finsert (1, &p
->name
);
961 Findent_to (make_number (13), minspace
);
963 if (!NILP (p
->raw_status_low
))
966 if (CONSP (p
->status
))
967 symbol
= XCONS (p
->status
)->car
;
970 if (EQ (symbol
, Qsignal
))
973 tem
= Fcar (Fcdr (p
->status
));
975 if (XINT (tem
) < NSIG
)
976 write_string (sys_errlist
[XINT (tem
)], -1);
979 Fprinc (symbol
, Qnil
);
981 else if (NETCONN_P (proc
))
983 if (EQ (symbol
, Qrun
))
984 write_string ("open", -1);
985 else if (EQ (symbol
, Qexit
))
986 write_string ("closed", -1);
988 Fprinc (symbol
, Qnil
);
991 Fprinc (symbol
, Qnil
);
993 if (EQ (symbol
, Qexit
))
996 tem
= Fcar (Fcdr (p
->status
));
999 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
1000 write_string (tembuf
, -1);
1004 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
1005 remove_process (proc
);
1007 Findent_to (make_number (22), minspace
);
1008 if (NILP (p
->buffer
))
1009 insert_string ("(none)");
1010 else if (NILP (XBUFFER (p
->buffer
)->name
))
1011 insert_string ("(Killed)");
1013 Finsert (1, &XBUFFER (p
->buffer
)->name
);
1015 Findent_to (make_number (37), minspace
);
1017 if (STRINGP (p
->tty_name
))
1018 Finsert (1, &p
->tty_name
);
1020 insert_string ("(none)");
1022 Findent_to (make_number (49), minspace
);
1024 if (NETCONN_P (proc
))
1026 sprintf (tembuf
, "(network stream connection to %s)\n",
1027 XSTRING (XCONS (p
->childp
)->car
)->data
);
1028 insert_string (tembuf
);
1040 insert_string (" ");
1042 insert_string ("\n");
1048 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
1049 "Display a list of all processes.\n\
1050 \(Any processes listed as Exited or Signaled are actually eliminated\n\
1051 after the listing is made.)")
1054 internal_with_output_to_temp_buffer ("*Process List*",
1055 list_processes_1
, Qnil
);
1059 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1060 "Return a list of all processes.")
1063 return Fmapcar (Qcdr
, Vprocess_alist
);
1066 /* Starting asynchronous inferior processes. */
1068 static Lisp_Object
start_process_unwind ();
1070 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1071 "Start a program in a subprocess. Return the process object for it.\n\
1072 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
1073 NAME is name for process. It is modified if necessary to make it unique.\n\
1074 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
1075 Process output goes at end of that buffer, unless you specify\n\
1076 an output stream or filter function to handle the output.\n\
1077 BUFFER may be also nil, meaning that this process is not associated\n\
1079 Third arg is program file name. It is searched for in PATH.\n\
1080 Remaining arguments are strings to give program as arguments.")
1083 register Lisp_Object
*args
;
1085 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1087 register unsigned char *new_argv
;
1090 register unsigned char **new_argv
;
1093 int count
= specpdl_ptr
- specpdl
;
1097 buffer
= Fget_buffer_create (buffer
);
1099 /* Make sure that the child will be able to chdir to the current
1100 buffer's current directory, or its unhandled equivalent. We
1101 can't just have the child check for an error when it does the
1102 chdir, since it's in a vfork.
1104 We have to GCPRO around this because Fexpand_file_name and
1105 Funhandled_file_name_directory might call a file name handling
1106 function. The argument list is protected by the caller, so all
1107 we really have to worry about is buffer. */
1109 struct gcpro gcpro1
, gcpro2
;
1111 current_dir
= current_buffer
->directory
;
1113 GCPRO2 (buffer
, current_dir
);
1116 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1118 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1119 report_file_error ("Setting current directory",
1120 Fcons (current_buffer
->directory
, Qnil
));
1126 CHECK_STRING (name
, 0);
1130 CHECK_STRING (program
, 2);
1133 /* Make a one member argv with all args concatenated
1134 together separated by a blank. */
1135 len
= STRING_BYTES (XSTRING (program
)) + 2;
1136 for (i
= 3; i
< nargs
; i
++)
1139 CHECK_STRING (tem
, i
);
1140 len
+= STRING_BYTES (XSTRING (tem
)) + 1; /* count the blank */
1142 new_argv
= (unsigned char *) alloca (len
);
1143 strcpy (new_argv
, XSTRING (program
)->data
);
1144 for (i
= 3; i
< nargs
; i
++)
1147 CHECK_STRING (tem
, i
);
1148 strcat (new_argv
, " ");
1149 strcat (new_argv
, XSTRING (tem
)->data
);
1151 /* Need to add code here to check for program existence on VMS */
1154 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1156 /* If program file name is not absolute, search our path for it */
1157 if (!IS_DIRECTORY_SEP (XSTRING (program
)->data
[0])
1158 && !(XSTRING (program
)->size
> 1
1159 && IS_DEVICE_SEP (XSTRING (program
)->data
[1])))
1161 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1164 GCPRO4 (name
, program
, buffer
, current_dir
);
1165 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1168 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1169 tem
= Fexpand_file_name (tem
, Qnil
);
1170 new_argv
[0] = XSTRING (tem
)->data
;
1174 if (!NILP (Ffile_directory_p (program
)))
1175 error ("Specified program for new process is a directory");
1177 new_argv
[0] = XSTRING (program
)->data
;
1180 for (i
= 3; i
< nargs
; i
++)
1183 CHECK_STRING (tem
, i
);
1184 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1186 new_argv
[i
- 2] = 0;
1187 #endif /* not VMS */
1189 proc
= make_process (name
);
1190 /* If an error occurs and we can't start the process, we want to
1191 remove it from the process list. This means that each error
1192 check in create_process doesn't need to call remove_process
1193 itself; it's all taken care of here. */
1194 record_unwind_protect (start_process_unwind
, proc
);
1196 XPROCESS (proc
)->childp
= Qt
;
1197 XPROCESS (proc
)->command_channel_p
= Qnil
;
1198 XPROCESS (proc
)->buffer
= buffer
;
1199 XPROCESS (proc
)->sentinel
= Qnil
;
1200 XPROCESS (proc
)->filter
= Qnil
;
1201 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1203 /* Make the process marker point into the process buffer (if any). */
1205 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1206 BUF_ZV (XBUFFER (buffer
)),
1207 BUF_ZV_BYTE (XBUFFER (buffer
)));
1209 if (!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
)
1210 || NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
))
1212 XPROCESS (proc
)->decode_coding_system
= Qnil
;
1213 XPROCESS (proc
)->encode_coding_system
= Qnil
;
1217 /* Setup coding systems for communicating with the process. */
1218 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1219 Lisp_Object coding_systems
= Qt
;
1220 Lisp_Object val
, *args2
;
1221 struct gcpro gcpro1
;
1223 if (!NILP (Vcoding_system_for_read
))
1224 val
= Vcoding_system_for_read
;
1225 else if (NILP (current_buffer
->enable_multibyte_characters
))
1229 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1230 args2
[0] = Qstart_process
;
1231 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1233 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1235 if (CONSP (coding_systems
))
1236 val
= XCONS (coding_systems
)->car
;
1237 else if (CONSP (Vdefault_process_coding_system
))
1238 val
= XCONS (Vdefault_process_coding_system
)->car
;
1242 XPROCESS (proc
)->decode_coding_system
= val
;
1244 if (!NILP (Vcoding_system_for_write
))
1245 val
= Vcoding_system_for_write
;
1246 else if (NILP (current_buffer
->enable_multibyte_characters
))
1250 if (EQ (coding_systems
, Qt
))
1252 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1253 args2
[0] = Qstart_process
;
1254 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1257 Ffind_operation_coding_system (nargs
+ 1, args2
);
1260 if (CONSP (coding_systems
))
1261 val
= XCONS (coding_systems
)->cdr
;
1262 else if (CONSP (Vdefault_process_coding_system
))
1263 val
= XCONS (Vdefault_process_coding_system
)->cdr
;
1267 XPROCESS (proc
)->encode_coding_system
= val
;
1270 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1271 XPROCESS (proc
)->decoding_carryover
= make_number (0);
1272 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1273 XPROCESS (proc
)->encoding_carryover
= make_number (0);
1275 XPROCESS (proc
)->inherit_coding_system_flag
1276 = (NILP (buffer
) || !inherit_process_coding_system
) ? 0 : 1;
1278 create_process (proc
, (char **) new_argv
, current_dir
);
1280 return unbind_to (count
, proc
);
1283 /* This function is the unwind_protect form for Fstart_process. If
1284 PROC doesn't have its pid set, then we know someone has signaled
1285 an error and the process wasn't started successfully, so we should
1286 remove it from the process list. */
1288 start_process_unwind (proc
)
1291 if (!PROCESSP (proc
))
1294 /* Was PROC started successfully? */
1295 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1296 remove_process (proc
);
1303 create_process_1 (signo
)
1306 #if defined (USG) && !defined (POSIX_SIGNALS)
1307 /* USG systems forget handlers when they are used;
1308 must reestablish each time */
1309 signal (signo
, create_process_1
);
1313 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1316 /* Mimic blocking of signals on system V, which doesn't really have it. */
1318 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1319 int sigchld_deferred
;
1322 create_process_sigchld ()
1324 signal (SIGCHLD
, create_process_sigchld
);
1326 sigchld_deferred
= 1;
1332 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1334 create_process (process
, new_argv
, current_dir
)
1335 Lisp_Object process
;
1337 Lisp_Object current_dir
;
1339 int pid
, inchannel
, outchannel
;
1341 #ifdef POSIX_SIGNALS
1344 struct sigaction sigint_action
;
1345 struct sigaction sigquit_action
;
1347 struct sigaction sighup_action
;
1349 #else /* !POSIX_SIGNALS */
1351 SIGTYPE (*sigchld
)();
1353 #endif /* !POSIX_SIGNALS */
1354 /* Use volatile to protect variables from being clobbered by longjmp. */
1355 volatile int forkin
, forkout
;
1356 volatile int pty_flag
= 0;
1357 extern char **environ
;
1359 inchannel
= outchannel
= -1;
1362 if (!NILP (Vprocess_connection_type
))
1363 outchannel
= inchannel
= allocate_pty ();
1368 /* On USG systems it does not work to open the pty's tty here
1369 and then close and reopen it in the child. */
1371 /* Don't let this terminal become our controlling terminal
1372 (in case we don't have one). */
1373 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1375 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1378 report_file_error ("Opening pty", Qnil
);
1380 forkin
= forkout
= -1;
1381 #endif /* not USG */
1385 #endif /* HAVE_PTYS */
1388 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1389 report_file_error ("Opening socketpair", Qnil
);
1390 outchannel
= inchannel
= sv
[0];
1391 forkout
= forkin
= sv
[1];
1393 #else /* not SKTPAIR */
1402 #endif /* not SKTPAIR */
1405 /* Replaced by close_process_descs */
1406 set_exclusive_use (inchannel
);
1407 set_exclusive_use (outchannel
);
1410 /* Stride people say it's a mystery why this is needed
1411 as well as the O_NDELAY, but that it fails without this. */
1412 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1415 ioctl (inchannel
, FIONBIO
, &one
);
1420 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1421 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1424 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1425 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1429 /* Record this as an active process, with its channels.
1430 As a result, child_setup will close Emacs's side of the pipes. */
1431 chan_process
[inchannel
] = process
;
1432 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1433 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1434 /* Record the tty descriptor used in the subprocess. */
1436 XPROCESS (process
)->subtty
= Qnil
;
1438 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1439 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1440 XPROCESS (process
)->status
= Qrun
;
1441 if (!proc_decode_coding_system
[inchannel
])
1442 proc_decode_coding_system
[inchannel
]
1443 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1444 setup_coding_system (XPROCESS (process
)->decode_coding_system
,
1445 proc_decode_coding_system
[inchannel
]);
1446 if (!proc_encode_coding_system
[outchannel
])
1447 proc_encode_coding_system
[outchannel
]
1448 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1449 setup_coding_system (XPROCESS (process
)->encode_coding_system
,
1450 proc_encode_coding_system
[outchannel
]);
1452 if (CODING_REQUIRE_ENCODING (proc_encode_coding_system
[outchannel
]))
1454 /* Here we encode arguments by the coding system used for
1455 sending data to the process. We don't support using
1456 different coding systems for encoding arguments and for
1457 encoding data sent to the process. */
1458 struct gcpro gcpro1
;
1460 struct coding_system
*coding
= proc_encode_coding_system
[outchannel
];
1462 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
1464 while (new_argv
[i
] != 0)
1466 int len
= strlen (new_argv
[i
]);
1467 int size
= encoding_buffer_size (coding
, len
);
1468 unsigned char *buf
= (unsigned char *) alloca (size
);
1470 encode_coding (coding
, new_argv
[i
], buf
, len
, size
);
1471 buf
[coding
->produced
] = 0;
1472 /* We don't have to free new_argv[i] because it points to a
1473 Lisp string given as an argument to `start-process'. */
1474 new_argv
[i
++] = buf
;
1477 coding
->mode
&= ~CODING_MODE_LAST_BLOCK
;
1480 /* Delay interrupts until we have a chance to store
1481 the new fork's pid in its process structure */
1482 #ifdef POSIX_SIGNALS
1483 sigemptyset (&blocked
);
1485 sigaddset (&blocked
, SIGCHLD
);
1488 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1489 this sets the parent's signal handlers as well as the child's.
1490 So delay all interrupts whose handlers the child might munge,
1491 and record the current handlers so they can be restored later. */
1492 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1493 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1495 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1497 #endif /* HAVE_VFORK */
1498 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1499 #else /* !POSIX_SIGNALS */
1503 #else /* not BSD4_1 */
1504 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1505 sigsetmask (sigmask (SIGCHLD
));
1506 #else /* ordinary USG */
1508 sigchld_deferred
= 0;
1509 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1511 #endif /* ordinary USG */
1512 #endif /* not BSD4_1 */
1513 #endif /* SIGCHLD */
1514 #endif /* !POSIX_SIGNALS */
1516 FD_SET (inchannel
, &input_wait_mask
);
1517 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1518 if (inchannel
> max_process_desc
)
1519 max_process_desc
= inchannel
;
1521 /* Until we store the proper pid, enable sigchld_handler
1522 to recognize an unknown pid as standing for this process.
1523 It is very important not to let this `marker' value stay
1524 in the table after this function has returned; if it does
1525 it might cause call-process to hang and subsequent asynchronous
1526 processes to get their return values scrambled. */
1527 XSETINT (XPROCESS (process
)->pid
, -1);
1532 /* child_setup must clobber environ on systems with true vfork.
1533 Protect it from permanent change. */
1534 char **save_environ
= environ
;
1536 current_dir
= ENCODE_FILE (current_dir
);
1541 #endif /* not WINDOWSNT */
1543 int xforkin
= forkin
;
1544 int xforkout
= forkout
;
1546 #if 0 /* This was probably a mistake--it duplicates code later on,
1547 but fails to handle all the cases. */
1548 /* Make sure SIGCHLD is not blocked in the child. */
1549 sigsetmask (SIGEMPTYMASK
);
1552 /* Make the pty be the controlling terminal of the process. */
1554 /* First, disconnect its current controlling terminal. */
1556 /* We tried doing setsid only if pty_flag, but it caused
1557 process_set_signal to fail on SGI when using a pipe. */
1559 /* Make the pty's terminal the controlling terminal. */
1563 /* We ignore the return value
1564 because faith@cs.unc.edu says that is necessary on Linux. */
1565 ioctl (xforkin
, TIOCSCTTY
, 0);
1568 #else /* not HAVE_SETSID */
1570 /* It's very important to call setpgrp here and no time
1571 afterwards. Otherwise, we lose our controlling tty which
1572 is set when we open the pty. */
1575 #endif /* not HAVE_SETSID */
1576 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1577 if (pty_flag
&& xforkin
>= 0)
1580 tcgetattr (xforkin
, &t
);
1582 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1583 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1586 #if defined (NTTYDISC) && defined (TIOCSETD)
1587 if (pty_flag
&& xforkin
>= 0)
1589 /* Use new line discipline. */
1590 int ldisc
= NTTYDISC
;
1591 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1596 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1597 can do TIOCSPGRP only to the process's controlling tty. */
1600 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1601 I can't test it since I don't have 4.3. */
1602 int j
= open ("/dev/tty", O_RDWR
, 0);
1603 ioctl (j
, TIOCNOTTY
, 0);
1606 /* In order to get a controlling terminal on some versions
1607 of BSD, it is necessary to put the process in pgrp 0
1608 before it opens the terminal. */
1616 #endif /* TIOCNOTTY */
1618 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
1619 /*** There is a suggestion that this ought to be a
1620 conditional on TIOCSPGRP,
1621 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1622 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1623 that system does seem to need this code, even though
1624 both HAVE_SETSID and TIOCSCTTY are defined. */
1625 /* Now close the pty (if we had it open) and reopen it.
1626 This makes the pty the controlling terminal of the subprocess. */
1629 #ifdef SET_CHILD_PTY_PGRP
1630 int pgrp
= getpid ();
1633 /* I wonder if close (open (pty_name, ...)) would work? */
1636 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1640 write (1, "Couldn't open the pty terminal ", 31);
1641 write (1, pty_name
, strlen (pty_name
));
1646 #ifdef SET_CHILD_PTY_PGRP
1647 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1648 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1651 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
1653 #ifdef SETUP_SLAVE_PTY
1658 #endif /* SETUP_SLAVE_PTY */
1660 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1661 Now reenable it in the child, so it will die when we want it to. */
1663 signal (SIGHUP
, SIG_DFL
);
1665 #endif /* HAVE_PTYS */
1667 signal (SIGINT
, SIG_DFL
);
1668 signal (SIGQUIT
, SIG_DFL
);
1670 /* Stop blocking signals in the child. */
1671 #ifdef POSIX_SIGNALS
1672 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1673 #else /* !POSIX_SIGNALS */
1677 #else /* not BSD4_1 */
1678 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1679 sigsetmask (SIGEMPTYMASK
);
1680 #else /* ordinary USG */
1682 signal (SIGCHLD
, sigchld
);
1684 #endif /* ordinary USG */
1685 #endif /* not BSD4_1 */
1686 #endif /* SIGCHLD */
1687 #endif /* !POSIX_SIGNALS */
1690 child_setup_tty (xforkout
);
1692 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1693 new_argv
, 1, current_dir
);
1694 #else /* not WINDOWSNT */
1695 child_setup (xforkin
, xforkout
, xforkout
,
1696 new_argv
, 1, current_dir
);
1697 #endif /* not WINDOWSNT */
1699 environ
= save_environ
;
1704 /* This runs in the Emacs process. */
1709 if (forkin
!= forkout
&& forkout
>= 0)
1714 /* vfork succeeded. */
1715 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1718 register_child (pid
, inchannel
);
1719 #endif /* WINDOWSNT */
1721 /* If the subfork execv fails, and it exits,
1722 this close hangs. I don't know why.
1723 So have an interrupt jar it loose. */
1725 signal (SIGALRM
, create_process_1
);
1727 XPROCESS (process
)->subtty
= Qnil
;
1732 if (forkin
!= forkout
&& forkout
>= 0)
1737 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1740 XPROCESS (process
)->tty_name
= Qnil
;
1743 /* Restore the signal state whether vfork succeeded or not.
1744 (We will signal an error, below, if it failed.) */
1745 #ifdef POSIX_SIGNALS
1747 /* Restore the parent's signal handlers. */
1748 sigaction (SIGINT
, &sigint_action
, 0);
1749 sigaction (SIGQUIT
, &sigquit_action
, 0);
1751 sigaction (SIGHUP
, &sighup_action
, 0);
1753 #endif /* HAVE_VFORK */
1754 /* Stop blocking signals in the parent. */
1755 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1756 #else /* !POSIX_SIGNALS */
1760 #else /* not BSD4_1 */
1761 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1762 sigsetmask (SIGEMPTYMASK
);
1763 #else /* ordinary USG */
1765 signal (SIGCHLD
, sigchld
);
1766 /* Now really handle any of these signals
1767 that came in during this function. */
1768 if (sigchld_deferred
)
1769 kill (getpid (), SIGCHLD
);
1771 #endif /* ordinary USG */
1772 #endif /* not BSD4_1 */
1773 #endif /* SIGCHLD */
1774 #endif /* !POSIX_SIGNALS */
1776 /* Now generate the error if vfork failed. */
1778 report_file_error ("Doing vfork", Qnil
);
1780 #endif /* not VMS */
1784 /* open a TCP network connection to a given HOST/SERVICE. Treated
1785 exactly like a normal process when reading and writing. Only
1786 differences are in status display and process deletion. A network
1787 connection has no PID; you cannot signal it. All you can do is
1788 deactivate and close it via delete-process */
1790 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1792 "Open a TCP connection for a service to a host.\n\
1793 Returns a subprocess-object to represent the connection.\n\
1794 Input and output work as for subprocesses; `delete-process' closes it.\n\
1795 Args are NAME BUFFER HOST SERVICE.\n\
1796 NAME is name for process. It is modified if necessary to make it unique.\n\
1797 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1798 Process output goes at end of that buffer, unless you specify\n\
1799 an output stream or filter function to handle the output.\n\
1800 BUFFER may be also nil, meaning that this process is not associated\n\
1802 Third arg is name of the host to connect to, or its IP address.\n\
1803 Fourth arg SERVICE is name of the service desired, or an integer\n\
1804 specifying a port number to connect to.")
1805 (name
, buffer
, host
, service
)
1806 Lisp_Object name
, buffer
, host
, service
;
1810 struct sockaddr_in address
;
1811 struct servent
*svc_info
;
1812 struct hostent
*host_info_ptr
, host_info
;
1813 char *(addr_list
[2]);
1814 IN_ADDR numeric_addr
;
1818 struct hostent host_info_fixed
;
1819 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1821 int count
= specpdl_ptr
- specpdl
;
1824 /* Ensure socket support is loaded if available. */
1825 init_winsock (TRUE
);
1828 GCPRO4 (name
, buffer
, host
, service
);
1829 CHECK_STRING (name
, 0);
1830 CHECK_STRING (host
, 0);
1831 if (INTEGERP (service
))
1832 port
= htons ((unsigned short) XINT (service
));
1835 CHECK_STRING (service
, 0);
1836 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1838 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1839 port
= svc_info
->s_port
;
1842 /* Slow down polling to every ten seconds.
1843 Some kernels have a bug which causes retrying connect to fail
1844 after a connect. Polling can interfere with gethostbyname too. */
1845 #ifdef POLL_FOR_INPUT
1846 bind_polling_period (10);
1857 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1860 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1863 Fsleep_for (make_number (1), Qnil
);
1865 if (host_info_ptr
== 0)
1866 /* Attempt to interpret host as numeric inet address */
1868 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1869 if (NUMERIC_ADDR_ERROR
)
1870 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1872 host_info_ptr
= &host_info
;
1873 host_info
.h_name
= 0;
1874 host_info
.h_aliases
= 0;
1875 host_info
.h_addrtype
= AF_INET
;
1877 /* Older machines have only one address slot called h_addr.
1878 Newer machines have h_addr_list, but #define h_addr to
1879 be its first element. */
1880 host_info
.h_addr_list
= &(addr_list
[0]);
1882 host_info
.h_addr
= (char*)(&numeric_addr
);
1884 /* numeric_addr isn't null-terminated; it has fixed length. */
1885 host_info
.h_length
= sizeof (numeric_addr
);
1888 bzero (&address
, sizeof address
);
1889 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1890 host_info_ptr
->h_length
);
1891 address
.sin_family
= host_info_ptr
->h_addrtype
;
1892 address
.sin_port
= port
;
1894 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1896 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1898 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1899 when connect is interrupted. So let's not let it get interrupted.
1900 Note we do not turn off polling, because polling is only used
1901 when not interrupt_input, and thus not normally used on the systems
1902 which have this bug. On systems which use polling, there's no way
1903 to quit if polling is turned off. */
1904 if (interrupt_input
)
1912 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1913 && errno
!= EISCONN
)
1921 if (errno
== EADDRINUSE
&& retry
< 20)
1923 /* A delay here is needed on some FreeBSD systems,
1924 and it is harmless, since this retrying takes time anyway
1925 and should be infrequent. */
1926 Fsleep_for (make_number (1), Qnil
);
1933 if (interrupt_input
)
1937 report_file_error ("connection failed",
1938 Fcons (host
, Fcons (name
, Qnil
)));
1943 #ifdef POLL_FOR_INPUT
1944 unbind_to (count
, Qnil
);
1947 if (interrupt_input
)
1951 s
= connect_server (0);
1953 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1954 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1955 send_command (s
, C_DUMB
, 1, 0);
1962 buffer
= Fget_buffer_create (buffer
);
1963 proc
= make_process (name
);
1965 chan_process
[inch
] = proc
;
1968 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1971 fcntl (inch
, F_SETFL
, O_NDELAY
);
1975 XPROCESS (proc
)->childp
= Fcons (host
, Fcons (service
, Qnil
));
1976 XPROCESS (proc
)->command_channel_p
= Qnil
;
1977 XPROCESS (proc
)->buffer
= buffer
;
1978 XPROCESS (proc
)->sentinel
= Qnil
;
1979 XPROCESS (proc
)->filter
= Qnil
;
1980 XPROCESS (proc
)->command
= Qnil
;
1981 XPROCESS (proc
)->pid
= Qnil
;
1982 XSETINT (XPROCESS (proc
)->infd
, inch
);
1983 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1984 XPROCESS (proc
)->status
= Qrun
;
1985 FD_SET (inch
, &input_wait_mask
);
1986 FD_SET (inch
, &non_keyboard_wait_mask
);
1987 if (inch
> max_process_desc
)
1988 max_process_desc
= inch
;
1990 if (!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
)
1991 || NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
))
1993 XPROCESS (proc
)->decode_coding_system
= Qnil
;
1994 XPROCESS (proc
)->encode_coding_system
= Qnil
;
1998 /* Setup coding systems for communicating with the network stream. */
1999 struct gcpro gcpro1
;
2000 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
2001 Lisp_Object coding_systems
= Qt
;
2002 Lisp_Object args
[5], val
;
2004 if (!NILP (Vcoding_system_for_read
))
2005 val
= Vcoding_system_for_read
;
2006 else if (NILP (current_buffer
->enable_multibyte_characters
))
2007 /* We dare not decode end-of-line format by setting VAL to
2008 Qraw_text, because the existing Emacs Lisp libraries
2009 assume that they receive bare code including a sequene of
2014 args
[0] = Qopen_network_stream
, args
[1] = name
,
2015 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
2017 coding_systems
= Ffind_operation_coding_system (5, args
);
2019 if (CONSP (coding_systems
))
2020 val
= XCONS (coding_systems
)->car
;
2021 else if (CONSP (Vdefault_process_coding_system
))
2022 val
= XCONS (Vdefault_process_coding_system
)->car
;
2026 XPROCESS (proc
)->decode_coding_system
= val
;
2028 if (!NILP (Vcoding_system_for_write
))
2029 val
= Vcoding_system_for_write
;
2030 else if (NILP (current_buffer
->enable_multibyte_characters
))
2034 if (EQ (coding_systems
, Qt
))
2036 args
[0] = Qopen_network_stream
, args
[1] = name
,
2037 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
2039 coding_systems
= Ffind_operation_coding_system (5, args
);
2042 if (CONSP (coding_systems
))
2043 val
= XCONS (coding_systems
)->cdr
;
2044 else if (CONSP (Vdefault_process_coding_system
))
2045 val
= XCONS (Vdefault_process_coding_system
)->cdr
;
2049 XPROCESS (proc
)->encode_coding_system
= val
;
2052 if (!proc_decode_coding_system
[inch
])
2053 proc_decode_coding_system
[inch
]
2054 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
2055 setup_coding_system (XPROCESS (proc
)->decode_coding_system
,
2056 proc_decode_coding_system
[inch
]);
2057 if (!proc_encode_coding_system
[outch
])
2058 proc_encode_coding_system
[outch
]
2059 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
2060 setup_coding_system (XPROCESS (proc
)->encode_coding_system
,
2061 proc_encode_coding_system
[outch
]);
2063 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
2064 XPROCESS (proc
)->decoding_carryover
= make_number (0);
2065 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
2066 XPROCESS (proc
)->encoding_carryover
= make_number (0);
2068 XPROCESS (proc
)->inherit_coding_system_flag
=
2069 NILP (buffer
) || !inherit_process_coding_system
? 0 : 1;
2074 #endif /* HAVE_SOCKETS */
2077 deactivate_process (proc
)
2080 register int inchannel
, outchannel
;
2081 register struct Lisp_Process
*p
= XPROCESS (proc
);
2083 inchannel
= XINT (p
->infd
);
2084 outchannel
= XINT (p
->outfd
);
2088 /* Beware SIGCHLD hereabouts. */
2089 flush_pending_output (inchannel
);
2092 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
2093 sys$
dassgn (outchannel
);
2094 vs
= get_vms_process_pointer (p
->pid
);
2096 give_back_vms_process_stuff (vs
);
2100 if (outchannel
>= 0 && outchannel
!= inchannel
)
2104 XSETINT (p
->infd
, -1);
2105 XSETINT (p
->outfd
, -1);
2106 chan_process
[inchannel
] = Qnil
;
2107 FD_CLR (inchannel
, &input_wait_mask
);
2108 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
2109 if (inchannel
== max_process_desc
)
2112 /* We just closed the highest-numbered process input descriptor,
2113 so recompute the highest-numbered one now. */
2114 max_process_desc
= 0;
2115 for (i
= 0; i
< MAXDESC
; i
++)
2116 if (!NILP (chan_process
[i
]))
2117 max_process_desc
= i
;
2122 /* Close all descriptors currently in use for communication
2123 with subprocess. This is used in a newly-forked subprocess
2124 to get rid of irrelevant descriptors. */
2127 close_process_descs ()
2131 for (i
= 0; i
< MAXDESC
; i
++)
2133 Lisp_Object process
;
2134 process
= chan_process
[i
];
2135 if (!NILP (process
))
2137 int in
= XINT (XPROCESS (process
)->infd
);
2138 int out
= XINT (XPROCESS (process
)->outfd
);
2141 if (out
>= 0 && in
!= out
)
2148 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
2150 "Allow any pending output from subprocesses to be read by Emacs.\n\
2151 It is read into the process' buffers or given to their filter functions.\n\
2152 Non-nil arg PROCESS means do not return until some output has been received\n\
2154 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
2155 seconds and microseconds to wait; return after that much time whether\n\
2156 or not there is input.\n\
2157 Return non-nil iff we received any output before the timeout expired.")
2158 (process
, timeout
, timeout_msecs
)
2159 register Lisp_Object process
, timeout
, timeout_msecs
;
2164 if (! NILP (timeout_msecs
))
2166 CHECK_NUMBER (timeout_msecs
, 2);
2167 useconds
= XINT (timeout_msecs
);
2168 if (!INTEGERP (timeout
))
2169 XSETINT (timeout
, 0);
2172 int carry
= useconds
/ 1000000;
2174 XSETINT (timeout
, XINT (timeout
) + carry
);
2175 useconds
-= carry
* 1000000;
2177 /* I think this clause is necessary because C doesn't
2178 guarantee a particular rounding direction for negative
2182 XSETINT (timeout
, XINT (timeout
) - 1);
2183 useconds
+= 1000000;
2190 if (! NILP (timeout
))
2192 CHECK_NUMBER (timeout
, 1);
2193 seconds
= XINT (timeout
);
2194 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
2206 XSETFASTINT (process
, 0);
2209 (wait_reading_process_input (seconds
, useconds
, process
, 0)
2213 /* This variable is different from waiting_for_input in keyboard.c.
2214 It is used to communicate to a lisp process-filter/sentinel (via the
2215 function Fwaiting_for_user_input_p below) whether emacs was waiting
2216 for user-input when that process-filter was called.
2217 waiting_for_input cannot be used as that is by definition 0 when
2218 lisp code is being evalled.
2219 This is also used in record_asynch_buffer_change.
2220 For that purpose, this must be 0
2221 when not inside wait_reading_process_input. */
2222 static int waiting_for_user_input_p
;
2224 /* This is here so breakpoints can be put on it. */
2226 wait_reading_process_input_1 ()
2230 /* Read and dispose of subprocess output while waiting for timeout to
2231 elapse and/or keyboard input to be available.
2234 timeout in seconds, or
2235 zero for no limit, or
2236 -1 means gobble data immediately available but don't wait for any.
2239 an additional duration to wait, measured in microseconds.
2240 If this is nonzero and time_limit is 0, then the timeout
2241 consists of MICROSECS only.
2243 READ_KBD is a lisp value:
2244 0 to ignore keyboard input, or
2245 1 to return when input is available, or
2246 -1 meaning caller will actually read the input, so don't throw to
2247 the quit handler, or
2248 a cons cell, meaning wait until its car is non-nil
2249 (and gobble terminal input into the buffer if any arrives), or
2250 a process object, meaning wait until something arrives from that
2251 process. The return value is true iff we read some input from
2254 DO_DISPLAY != 0 means redisplay should be done to show subprocess
2255 output that arrives.
2257 If READ_KBD is a pointer to a struct Lisp_Process, then the
2258 function returns true iff we received input from that process
2259 before the timeout elapsed.
2260 Otherwise, return true iff we received input from any process. */
2263 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
2264 int time_limit
, microsecs
;
2265 Lisp_Object read_kbd
;
2268 register int channel
, nfds
, m
;
2269 static SELECT_TYPE Available
;
2272 EMACS_TIME timeout
, end_time
, garbage
;
2274 int wait_channel
= -1;
2275 struct Lisp_Process
*wait_proc
= 0;
2276 int got_some_input
= 0;
2277 Lisp_Object
*wait_for_cell
= 0;
2279 FD_ZERO (&Available
);
2281 /* If read_kbd is a process to watch, set wait_proc and wait_channel
2283 if (PROCESSP (read_kbd
))
2285 wait_proc
= XPROCESS (read_kbd
);
2286 wait_channel
= XINT (wait_proc
->infd
);
2287 XSETFASTINT (read_kbd
, 0);
2290 /* If waiting for non-nil in a cell, record where. */
2291 if (CONSP (read_kbd
))
2293 wait_for_cell
= &XCONS (read_kbd
)->car
;
2294 XSETFASTINT (read_kbd
, 0);
2297 waiting_for_user_input_p
= XINT (read_kbd
);
2299 /* Since we may need to wait several times,
2300 compute the absolute time to return at. */
2301 if (time_limit
|| microsecs
)
2303 EMACS_GET_TIME (end_time
);
2304 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
2305 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2308 /* AlainF 5-Jul-1996
2309 HP-UX 10.10 seem to have problems with signals coming in
2310 Causes "poll: interrupted system call" messages when Emacs is run
2312 Turn off periodic alarms (in case they are in use) */
2318 int timeout_reduced_for_timers
= 0;
2320 /* If calling from keyboard input, do not quit
2321 since we want to return C-g as an input character.
2322 Otherwise, do pending quit if requested. */
2323 if (XINT (read_kbd
) >= 0)
2326 /* Exit now if the cell we're waiting for became non-nil. */
2327 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2330 /* Compute time from now till when time limit is up */
2331 /* Exit if already run out */
2332 if (time_limit
== -1)
2334 /* -1 specified for timeout means
2335 gobble output available now
2336 but don't wait at all. */
2338 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2340 else if (time_limit
|| microsecs
)
2342 EMACS_GET_TIME (timeout
);
2343 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2344 if (EMACS_TIME_NEG_P (timeout
))
2349 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
2352 /* Normally we run timers here.
2353 But not if wait_for_cell; in those cases,
2354 the wait is supposed to be short,
2355 and those callers cannot handle running arbitrary Lisp code here. */
2356 if (! wait_for_cell
)
2358 EMACS_TIME timer_delay
;
2362 old_timers_run
= timers_run
;
2363 timer_delay
= timer_check (1);
2364 if (timers_run
!= old_timers_run
&& do_display
)
2366 redisplay_preserve_echo_area ();
2367 /* We must retry, since a timer may have requeued itself
2368 and that could alter the time_delay. */
2372 /* If there is unread keyboard input, also return. */
2373 if (XINT (read_kbd
) != 0
2374 && requeued_events_pending_p ())
2377 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
2379 EMACS_TIME difference
;
2380 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
2381 if (EMACS_TIME_NEG_P (difference
))
2383 timeout
= timer_delay
;
2384 timeout_reduced_for_timers
= 1;
2387 /* If time_limit is -1, we are not going to wait at all. */
2388 else if (time_limit
!= -1)
2390 /* This is so a breakpoint can be put here. */
2391 wait_reading_process_input_1 ();
2395 /* Cause C-g and alarm signals to take immediate action,
2396 and cause input available signals to zero out timeout.
2398 It is important that we do this before checking for process
2399 activity. If we get a SIGCHLD after the explicit checks for
2400 process activity, timeout is the only way we will know. */
2401 if (XINT (read_kbd
) < 0)
2402 set_waiting_for_input (&timeout
);
2404 /* If status of something has changed, and no input is
2405 available, notify the user of the change right away. After
2406 this explicit check, we'll let the SIGCHLD handler zap
2407 timeout to get our attention. */
2408 if (update_tick
!= process_tick
&& do_display
)
2410 Atemp
= input_wait_mask
;
2411 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2412 if ((select (max (max_process_desc
, max_keyboard_desc
) + 1,
2413 &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2417 /* It's okay for us to do this and then continue with
2418 the loop, since timeout has already been zeroed out. */
2419 clear_waiting_for_input ();
2424 /* Don't wait for output from a non-running process. */
2425 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2426 update_status (wait_proc
);
2428 && ! EQ (wait_proc
->status
, Qrun
))
2430 int nread
, total_nread
= 0;
2432 clear_waiting_for_input ();
2433 XSETPROCESS (proc
, wait_proc
);
2435 /* Read data from the process, until we exhaust it. */
2436 while (XINT (wait_proc
->infd
) >= 0
2438 = read_process_output (proc
, XINT (wait_proc
->infd
))))
2441 total_nread
+= nread
;
2443 else if (nread
== -1 && EIO
== errno
)
2447 if (total_nread
> 0 && do_display
)
2448 redisplay_preserve_echo_area ();
2453 /* Wait till there is something to do */
2456 Available
= non_process_wait_mask
;
2457 else if (! XINT (read_kbd
))
2458 Available
= non_keyboard_wait_mask
;
2460 Available
= input_wait_mask
;
2462 /* If frame size has changed or the window is newly mapped,
2463 redisplay now, before we start to wait. There is a race
2464 condition here; if a SIGIO arrives between now and the select
2465 and indicates that a frame is trashed, the select may block
2466 displaying a trashed screen. */
2467 if (frame_garbaged
&& do_display
)
2469 clear_waiting_for_input ();
2470 redisplay_preserve_echo_area ();
2471 if (XINT (read_kbd
) < 0)
2472 set_waiting_for_input (&timeout
);
2475 if (XINT (read_kbd
) && detect_input_pending ())
2478 FD_ZERO (&Available
);
2481 nfds
= select (max (max_process_desc
, max_keyboard_desc
) + 1,
2482 &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2487 /* Make C-g and alarm signals set flags again */
2488 clear_waiting_for_input ();
2490 /* If we woke up due to SIGWINCH, actually change size now. */
2491 do_pending_window_change ();
2493 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
2494 /* We wanted the full specified time, so return now. */
2498 if (xerrno
== EINTR
)
2499 FD_ZERO (&Available
);
2501 /* Ultrix select seems to return ENOMEM when it is
2502 interrupted. Treat it just like EINTR. Bleah. Note
2503 that we want to test for the "ultrix" CPP symbol, not
2504 "__ultrix__"; the latter is only defined under GCC, but
2505 not by DEC's bundled CC. -JimB */
2506 else if (xerrno
== ENOMEM
)
2507 FD_ZERO (&Available
);
2510 /* This happens for no known reason on ALLIANT.
2511 I am guessing that this is the right response. -- RMS. */
2512 else if (xerrno
== EFAULT
)
2513 FD_ZERO (&Available
);
2515 else if (xerrno
== EBADF
)
2518 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2519 the child's closure of the pts gives the parent a SIGHUP, and
2520 the ptc file descriptor is automatically closed,
2521 yielding EBADF here or at select() call above.
2522 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2523 in m/ibmrt-aix.h), and here we just ignore the select error.
2524 Cleanup occurs c/o status_notify after SIGCLD. */
2525 FD_ZERO (&Available
); /* Cannot depend on values returned */
2531 error ("select error: %s", strerror (xerrno
));
2533 #if defined(sun) && !defined(USG5_4)
2534 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2536 /* System sometimes fails to deliver SIGIO.
2538 David J. Mackenzie says that Emacs doesn't compile under
2539 Solaris if this code is enabled, thus the USG5_4 in the CPP
2540 conditional. "I haven't noticed any ill effects so far.
2541 If you find a Solaris expert somewhere, they might know
2543 kill (getpid (), SIGIO
);
2546 #if 0 /* When polling is used, interrupt_input is 0,
2547 so get_input_pending should read the input.
2548 So this should not be needed. */
2549 /* If we are using polling for input,
2550 and we see input available, make it get read now.
2551 Otherwise it might not actually get read for a second.
2552 And on hpux, since we turn off polling in wait_reading_process_input,
2553 it might never get read at all if we don't spend much time
2554 outside of wait_reading_process_input. */
2555 if (XINT (read_kbd
) && interrupt_input
2556 && keyboard_bit_set (&Available
)
2557 && input_polling_used ())
2558 kill (getpid (), SIGALRM
);
2561 /* Check for keyboard input */
2562 /* If there is any, return immediately
2563 to give it higher priority than subprocesses */
2565 if (XINT (read_kbd
) != 0
2566 && detect_input_pending_run_timers (do_display
))
2568 swallow_events (do_display
);
2569 if (detect_input_pending_run_timers (do_display
))
2573 /* If there is unread keyboard input, also return. */
2574 if (XINT (read_kbd
) != 0
2575 && requeued_events_pending_p ())
2578 /* If we are not checking for keyboard input now,
2579 do process events (but don't run any timers).
2580 This is so that X events will be processed.
2581 Otherwise they may have to wait until polling takes place.
2582 That would causes delays in pasting selections, for example.
2584 (We used to do this only if wait_for_cell.) */
2585 if (XINT (read_kbd
) == 0 && detect_input_pending ())
2587 swallow_events (do_display
);
2588 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
2589 if (detect_input_pending ())
2594 /* Exit now if the cell we're waiting for became non-nil. */
2595 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2599 /* If we think we have keyboard input waiting, but didn't get SIGIO,
2600 go read it. This can happen with X on BSD after logging out.
2601 In that case, there really is no input and no SIGIO,
2602 but select says there is input. */
2604 if (XINT (read_kbd
) && interrupt_input
2605 && keyboard_bit_set (&Available
))
2606 kill (getpid (), SIGIO
);
2610 got_some_input
|= nfds
> 0;
2612 /* If checking input just got us a size-change event from X,
2613 obey it now if we should. */
2614 if (XINT (read_kbd
) || wait_for_cell
)
2615 do_pending_window_change ();
2617 /* Check for data from a process. */
2618 /* Really FIRST_PROC_DESC should be 0 on Unix,
2619 but this is safer in the short run. */
2620 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2622 if (FD_ISSET (channel
, &Available
)
2623 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2627 /* If waiting for this channel, arrange to return as
2628 soon as no more input to be processed. No more
2630 if (wait_channel
== channel
)
2636 proc
= chan_process
[channel
];
2640 /* Read data from the process, starting with our
2641 buffered-ahead character if we have one. */
2643 nread
= read_process_output (proc
, channel
);
2646 /* Since read_process_output can run a filter,
2647 which can call accept-process-output,
2648 don't try to read from any other processes
2649 before doing the select again. */
2650 FD_ZERO (&Available
);
2653 redisplay_preserve_echo_area ();
2656 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2659 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
2660 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
2662 else if (nread
== -1 && errno
== EAGAIN
)
2666 else if (nread
== -1 && errno
== EAGAIN
)
2668 /* Note that we cannot distinguish between no input
2669 available now and a closed pipe.
2670 With luck, a closed pipe will be accompanied by
2671 subprocess termination and SIGCHLD. */
2672 else if (nread
== 0 && !NETCONN_P (proc
))
2674 #endif /* O_NDELAY */
2675 #endif /* O_NONBLOCK */
2677 /* On some OSs with ptys, when the process on one end of
2678 a pty exits, the other end gets an error reading with
2679 errno = EIO instead of getting an EOF (0 bytes read).
2680 Therefore, if we get an error reading and errno =
2681 EIO, just continue, because the child process has
2682 exited and should clean itself up soon (e.g. when we
2684 else if (nread
== -1 && errno
== EIO
)
2686 #endif /* HAVE_PTYS */
2687 /* If we can detect process termination, don't consider the process
2688 gone just because its pipe is closed. */
2690 else if (nread
== 0 && !NETCONN_P (proc
))
2695 /* Preserve status of processes already terminated. */
2696 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2697 deactivate_process (proc
);
2698 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2699 update_status (XPROCESS (proc
));
2700 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2701 XPROCESS (proc
)->status
2702 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2705 } /* end for each file descriptor */
2706 } /* end while exit conditions not met */
2708 waiting_for_user_input_p
= 0;
2710 /* If calling from keyboard input, do not quit
2711 since we want to return C-g as an input character.
2712 Otherwise, do pending quit if requested. */
2713 if (XINT (read_kbd
) >= 0)
2715 /* Prevent input_pending from remaining set if we quit. */
2716 clear_input_pending ();
2720 /* AlainF 5-Jul-1996
2721 HP-UX 10.10 seems to have problems with signals coming in
2722 Causes "poll: interrupted system call" messages when Emacs is run
2724 Turn periodic alarms back on */
2728 return got_some_input
;
2731 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2734 read_process_output_call (fun_and_args
)
2735 Lisp_Object fun_and_args
;
2737 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2741 read_process_output_error_handler (error
)
2744 cmd_error_internal (error
, "error in process filter: ");
2746 update_echo_area ();
2747 Fsleep_for (make_number (2), Qnil
);
2750 /* Read pending output from the process channel,
2751 starting with our buffered-ahead character if we have one.
2752 Yield number of decoded characters read.
2754 This function reads at most 1024 characters.
2755 If you want to read all available subprocess output,
2756 you must call it repeatedly until it returns zero.
2758 The characters read are decoded according to PROC's coding-system
2762 read_process_output (proc
, channel
)
2764 register int channel
;
2766 register int nchars
, nbytes
;
2769 int chars_allocated
= 0; /* If 1, `chars' should be freed later. */
2773 register Lisp_Object outstream
;
2774 register struct buffer
*old
= current_buffer
;
2775 register struct Lisp_Process
*p
= XPROCESS (proc
);
2776 register int opoint
;
2777 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
2778 int chars_in_decoding_buf
= 0; /* If 1, `chars' points
2779 XSTRING (p->decoding_buf)->data. */
2780 int carryover
= XINT (p
->decoding_carryover
);
2783 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2785 vs
= get_vms_process_pointer (p
->pid
);
2789 return(0); /* Really weird if it does this */
2790 if (!(vs
->iosb
[0] & 1))
2791 return -1; /* I/O error */
2794 error ("Could not get VMS process pointer");
2795 chars
= vs
->inputBuffer
;
2796 nbytes
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2799 start_vms_process_read (vs
); /* Crank up the next read on the process */
2800 return 1; /* Nothing worth printing, say we got 1 */
2804 /* The data carried over in the previous decoding (which are at
2805 the tail of decoding buffer) should be prepended to the new
2806 data read to decode all together. */
2807 char *buf
= (char *) xmalloc (nbytes
+ carryover
);
2809 bcopy (XSTRING (p
->decoding_buf
)->data
2810 + STRING_BYTES (XSTRING (p
->decoding_buf
)) - carryover
,
2812 bcopy (chars
, buf
+ carryover
, nbytes
);
2814 chars_allocated
= 1;
2819 /* See the comment above. */
2820 bcopy (XSTRING (p
->decoding_buf
)->data
2821 + STRING_BYTES (XSTRING (p
->decoding_buf
)) - carryover
,
2824 if (proc_buffered_char
[channel
] < 0)
2825 nbytes
= read (channel
, buf
+ carryover
, (sizeof buf
) - carryover
);
2828 buf
[carryover
] = proc_buffered_char
[channel
];
2829 proc_buffered_char
[channel
] = -1;
2830 nbytes
= read (channel
, buf
+ carryover
+ 1,
2831 (sizeof buf
) - carryover
- 1);
2835 nbytes
= nbytes
+ 1;
2838 #endif /* not VMS */
2840 /* At this point, NBYTES holds number of characters just received
2841 (including the one in proc_buffered_char[channel]). */
2842 if (nbytes
<= 0) return nbytes
;
2844 /* Now set NBYTES how many bytes we must decode. */
2845 nbytes
+= carryover
;
2848 if (CODING_MAY_REQUIRE_DECODING (coding
))
2850 int require
= decoding_buffer_size (coding
, nbytes
);
2853 if (STRING_BYTES (XSTRING (p
->decoding_buf
)) < require
)
2854 p
->decoding_buf
= make_uninit_string (require
);
2855 result
= decode_coding (coding
, chars
, XSTRING (p
->decoding_buf
)->data
,
2856 nbytes
, STRING_BYTES (XSTRING (p
->decoding_buf
)));
2857 carryover
= nbytes
- coding
->consumed
;
2859 /* A new coding system might be found by `decode_coding'. */
2860 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
2862 p
->decode_coding_system
= coding
->symbol
;
2864 /* Don't call setup_coding_system for
2865 proc_decode_coding_system[channel] here. It is done in
2866 detect_coding called via decode_coding above. */
2868 /* If a coding system for encoding is not yet decided, we set
2869 it as the same as coding-system for decoding.
2871 But, before doing that we must check if
2872 proc_encode_coding_system[p->outfd] surely points to a
2873 valid memory because p->outfd will be changed once EOF is
2874 sent to the process. */
2875 if (NILP (p
->encode_coding_system
)
2876 && proc_encode_coding_system
[XINT (p
->outfd
)])
2878 p
->encode_coding_system
= coding
->symbol
;
2879 setup_coding_system (coding
->symbol
,
2880 proc_encode_coding_system
[XINT (p
->outfd
)]);
2885 /* Now we don't need the contents of `chars'. */
2886 if (chars_allocated
)
2889 if (coding
->produced
== 0)
2891 chars
= (char *) XSTRING (p
->decoding_buf
)->data
;
2892 nbytes
= coding
->produced
;
2893 nchars
= (coding
->fake_multibyte
2894 ? multibyte_chars_in_text (chars
, nbytes
)
2895 : coding
->produced_char
);
2896 chars_in_decoding_buf
= 1;
2899 else if (chars_allocated
)
2901 /* Although we don't have to decode the received data, we must
2902 move it to an area which we don't have to free. */
2903 if (! STRINGP (p
->decoding_buf
)
2904 || STRING_BYTES (XSTRING (p
->decoding_buf
)) < nbytes
)
2905 p
->decoding_buf
= make_uninit_string (nbytes
);
2906 bcopy (chars
, XSTRING (p
->decoding_buf
)->data
, nbytes
);
2908 chars
= XSTRING (p
->decoding_buf
)->data
;
2909 nchars
= multibyte_chars_in_text (chars
, nbytes
);
2910 chars_in_decoding_buf
= 1;
2915 XSETINT (p
->decoding_carryover
, carryover
);
2916 Vlast_coding_system_used
= coding
->symbol
;
2918 /* If the caller required, let the process associated buffer
2919 inherit the coding-system used to decode the process output. */
2920 if (p
->inherit_coding_system_flag
2921 && !NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2923 struct buffer
*prev_buf
= current_buffer
;
2925 Fset_buffer (p
->buffer
);
2926 call1 (intern ("after-insert-file-set-buffer-file-coding-system"),
2927 make_number (nbytes
));
2928 set_buffer_internal (prev_buf
);
2931 /* Read and dispose of the process output. */
2932 outstream
= p
->filter
;
2933 if (!NILP (outstream
))
2935 /* We inhibit quit here instead of just catching it so that
2936 hitting ^G when a filter happens to be running won't screw
2938 int count
= specpdl_ptr
- specpdl
;
2939 Lisp_Object odeactivate
;
2940 Lisp_Object obuffer
, okeymap
;
2942 int outer_running_asynch_code
= running_asynch_code
;
2944 /* No need to gcpro these, because all we do with them later
2945 is test them for EQness, and none of them should be a string. */
2946 odeactivate
= Vdeactivate_mark
;
2947 XSETBUFFER (obuffer
, current_buffer
);
2948 okeymap
= current_buffer
->keymap
;
2950 specbind (Qinhibit_quit
, Qt
);
2951 specbind (Qlast_nonmenu_event
, Qt
);
2953 /* In case we get recursively called,
2954 and we already saved the match data nonrecursively,
2955 save the same match data in safely recursive fashion. */
2956 if (outer_running_asynch_code
)
2959 /* Don't clobber the CURRENT match data, either! */
2960 tem
= Fmatch_data (Qnil
, Qnil
);
2961 restore_match_data ();
2962 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
2963 Fset_match_data (tem
);
2966 /* For speed, if a search happens within this code,
2967 save the match data in a special nonrecursive fashion. */
2968 running_asynch_code
= 1;
2970 text
= make_string_from_bytes (chars
, nchars
, nbytes
);
2971 internal_condition_case_1 (read_process_output_call
,
2973 Fcons (proc
, Fcons (text
, Qnil
))),
2974 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2975 read_process_output_error_handler
);
2977 /* If we saved the match data nonrecursively, restore it now. */
2978 restore_match_data ();
2979 running_asynch_code
= outer_running_asynch_code
;
2981 /* Handling the process output should not deactivate the mark. */
2982 Vdeactivate_mark
= odeactivate
;
2984 #if 0 /* Call record_asynch_buffer_change unconditionally,
2985 because we might have changed minor modes or other things
2986 that affect key bindings. */
2987 if (! EQ (Fcurrent_buffer (), obuffer
)
2988 || ! EQ (current_buffer
->keymap
, okeymap
))
2990 /* But do it only if the caller is actually going to read events.
2991 Otherwise there's no need to make him wake up, and it could
2992 cause trouble (for example it would make Fsit_for return). */
2993 if (waiting_for_user_input_p
== -1)
2994 record_asynch_buffer_change ();
2997 start_vms_process_read (vs
);
2999 unbind_to (count
, Qnil
);
3003 /* If no filter, write into buffer if it isn't dead. */
3004 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
3006 Lisp_Object old_read_only
;
3007 int old_begv
, old_zv
;
3008 int old_begv_byte
, old_zv_byte
;
3009 Lisp_Object odeactivate
;
3010 int before
, before_byte
;
3013 odeactivate
= Vdeactivate_mark
;
3015 Fset_buffer (p
->buffer
);
3017 opoint_byte
= PT_BYTE
;
3018 old_read_only
= current_buffer
->read_only
;
3021 old_begv_byte
= BEGV_BYTE
;
3022 old_zv_byte
= ZV_BYTE
;
3024 current_buffer
->read_only
= Qnil
;
3026 /* Insert new output into buffer
3027 at the current end-of-output marker,
3028 thus preserving logical ordering of input and output. */
3029 if (XMARKER (p
->mark
)->buffer
)
3030 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
3031 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
3034 SET_PT_BOTH (ZV
, ZV_BYTE
);
3036 before_byte
= PT_BYTE
;
3038 /* If the output marker is outside of the visible region, save
3039 the restriction and widen. */
3040 if (! (BEGV
<= PT
&& PT
<= ZV
))
3043 /* Insert before markers in case we are inserting where
3044 the buffer's mark is, and the user's next command is Meta-y. */
3045 if (chars_in_decoding_buf
)
3047 /* Since multibyteness of p->docoding_buf is corrupted, we
3048 can't use insert_from_string_before_markers. */
3051 temp_buf
= (char *) alloca (nbytes
);
3052 bcopy (XSTRING (p
->decoding_buf
)->data
, temp_buf
, nbytes
);
3053 insert_before_markers (temp_buf
, nbytes
);
3056 insert_1_both (chars
, nchars
, nbytes
, 0, 1, 1);
3057 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
3059 update_mode_lines
++;
3061 /* Make sure opoint and the old restrictions
3062 float ahead of any new text just as point would. */
3063 if (opoint
>= before
)
3065 opoint
+= PT
- before
;
3066 opoint_byte
+= PT_BYTE
- before_byte
;
3068 if (old_begv
> before
)
3070 old_begv
+= PT
- before
;
3071 old_begv_byte
+= PT_BYTE
- before_byte
;
3073 if (old_zv
>= before
)
3075 old_zv
+= PT
- before
;
3076 old_zv_byte
+= PT_BYTE
- before_byte
;
3079 /* If the restriction isn't what it should be, set it. */
3080 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
3081 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
3083 /* Handling the process output should not deactivate the mark. */
3084 Vdeactivate_mark
= odeactivate
;
3086 current_buffer
->read_only
= old_read_only
;
3087 SET_PT_BOTH (opoint
, opoint_byte
);
3088 set_buffer_internal (old
);
3091 start_vms_process_read (vs
);
3096 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
3098 "Returns non-nil if emacs is waiting for input from the user.\n\
3099 This is intended for use by asynchronous process output filters and sentinels.")
3102 return (waiting_for_user_input_p
? Qt
: Qnil
);
3105 /* Sending data to subprocess */
3107 jmp_buf send_process_frame
;
3110 send_process_trap ()
3116 longjmp (send_process_frame
, 1);
3119 /* Send some data to process PROC.
3120 BUF is the beginning of the data; LEN is the number of characters.
3121 OBJECT is the Lisp object that the data comes from.
3123 The data is encoded by PROC's coding-system for encoding before it
3124 is sent. But if the data ends at the middle of multi-byte
3125 representation, that incomplete sequence of bytes are sent without
3126 being encoded. Should we store them in a buffer to prepend them to
3127 the data send later? */
3130 send_process (proc
, buf
, len
, object
)
3131 volatile Lisp_Object proc
;
3136 /* Use volatile to protect variables from being clobbered by longjmp. */
3138 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
3139 struct coding_system
*coding
;
3140 struct gcpro gcpro1
;
3141 int carryover
= XINT (XPROCESS (proc
)->encoding_carryover
);
3146 struct Lisp_Process
*p
= XPROCESS (proc
);
3147 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
3150 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3151 update_status (XPROCESS (proc
));
3152 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3153 error ("Process %s not running", procname
);
3154 if (XINT (XPROCESS (proc
)->outfd
) < 0)
3155 error ("Output file descriptor of %s is closed", procname
);
3157 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
3158 Vlast_coding_system_used
= coding
->symbol
;
3160 if (CODING_REQUIRE_ENCODING (coding
))
3162 int require
= encoding_buffer_size (coding
, len
);
3164 unsigned char *temp_buf
= NULL
;
3166 /* Remember the offset of data because a string or a buffer may
3167 be relocated. Setting OFFSET to -1 means we don't have to
3169 offset
= (BUFFERP (object
)
3170 ? BUF_PTR_BYTE_POS (XBUFFER (object
), buf
)
3172 ? offset
= buf
- XSTRING (object
)->data
3177 temp_buf
= (unsigned char *) xmalloc (len
+ carryover
);
3181 if (BUFFERP (object
))
3182 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
3183 else if (STRINGP (object
))
3184 buf
= offset
+ XSTRING (object
)->data
;
3185 /* Now we don't have to care relocation. */
3188 bcopy ((XSTRING (XPROCESS (proc
)->encoding_buf
)->data
3189 + STRING_BYTES (XSTRING (XPROCESS (proc
)->encoding_buf
))
3193 bcopy (buf
, temp_buf
+ carryover
, len
);
3197 if (STRING_BYTES (XSTRING (XPROCESS (proc
)->encoding_buf
)) < require
)
3199 XPROCESS (proc
)->encoding_buf
= make_uninit_string (require
);
3203 if (BUFFERP (object
))
3204 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
3205 else if (STRINGP (object
))
3206 buf
= offset
+ XSTRING (object
)->data
;
3209 object
= XPROCESS (proc
)->encoding_buf
;
3210 encode_coding (coding
, buf
, XSTRING (object
)->data
,
3211 len
, STRING_BYTES (XSTRING (object
)));
3212 len
= coding
->produced
;
3213 buf
= XSTRING (object
)->data
;
3219 vs
= get_vms_process_pointer (p
->pid
);
3221 error ("Could not find this process: %x", p
->pid
);
3222 else if (write_to_vms_process (vs
, buf
, len
))
3226 if (pty_max_bytes
== 0)
3228 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
3229 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
3231 if (pty_max_bytes
< 0)
3232 pty_max_bytes
= 250;
3234 pty_max_bytes
= 250;
3236 /* Deduct one, to leave space for the eof. */
3240 if (!setjmp (send_process_frame
))
3244 SIGTYPE (*old_sigpipe
)();
3247 /* Decide how much data we can send in one batch.
3248 Long lines need to be split into multiple batches. */
3249 if (!NILP (XPROCESS (proc
)->pty_flag
))
3251 /* Starting this at zero is always correct when not the first iteration
3252 because the previous iteration ended by sending C-d.
3253 It may not be correct for the first iteration
3254 if a partial line was sent in a separate send_process call.
3255 If that proves worth handling, we need to save linepos
3256 in the process object. */
3258 unsigned char *ptr
= buf
;
3259 unsigned char *end
= buf
+ len
;
3261 /* Scan through this text for a line that is too long. */
3262 while (ptr
!= end
&& linepos
< pty_max_bytes
)
3270 /* If we found one, break the line there
3271 and put in a C-d to force the buffer through. */
3275 /* Send this batch, using one or more write calls. */
3278 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
3279 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
3280 signal (SIGPIPE
, old_sigpipe
);
3286 || errno
== EWOULDBLOCK
3292 /* Buffer is full. Wait, accepting input;
3293 that may allow the program
3294 to finish doing output and read more. */
3299 /* Running filters might relocate buffers or strings.
3300 Arrange to relocate BUF. */
3301 if (BUFFERP (object
))
3302 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
3303 else if (STRINGP (object
))
3304 offset
= buf
- XSTRING (object
)->data
;
3306 XSETFASTINT (zero
, 0);
3307 #ifdef EMACS_HAS_USECS
3308 wait_reading_process_input (0, 20000, zero
, 0);
3310 wait_reading_process_input (1, 0, zero
, 0);
3313 if (BUFFERP (object
))
3314 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
3315 else if (STRINGP (object
))
3316 buf
= offset
+ XSTRING (object
)->data
;
3321 /* This is a real error. */
3322 report_file_error ("writing to process", Fcons (proc
, Qnil
));
3329 /* If we sent just part of the string, put in an EOF
3330 to force it through, before we send the rest. */
3332 Fprocess_send_eof (proc
);
3337 XPROCESS (proc
)->raw_status_low
= Qnil
;
3338 XPROCESS (proc
)->raw_status_high
= Qnil
;
3339 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
3340 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
3341 deactivate_process (proc
);
3343 error ("Error writing to process %s; closed it", procname
);
3345 error ("SIGPIPE raised on process %s; closed it", procname
);
3352 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
3354 "Send current contents of region as input to PROCESS.\n\
3355 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3356 nil, indicating the current buffer's process.\n\
3357 Called from program, takes three arguments, PROCESS, START and END.\n\
3358 If the region is more than 500 characters long,\n\
3359 it is sent in several bunches. This may happen even for shorter regions.\n\
3360 Output from processes can arrive in between bunches.")
3361 (process
, start
, end
)
3362 Lisp_Object process
, start
, end
;
3367 proc
= get_process (process
);
3368 validate_region (&start
, &end
);
3370 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
3371 move_gap (XINT (start
));
3373 start1
= CHAR_TO_BYTE (XINT (start
));
3374 end1
= CHAR_TO_BYTE (XINT (end
));
3375 send_process (proc
, BYTE_POS_ADDR (start1
), end1
- start1
,
3376 Fcurrent_buffer ());
3381 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
3383 "Send PROCESS the contents of STRING as input.\n\
3384 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3385 nil, indicating the current buffer's process.\n\
3386 If STRING is more than 500 characters long,\n\
3387 it is sent in several bunches. This may happen even for shorter strings.\n\
3388 Output from processes can arrive in between bunches.")
3390 Lisp_Object process
, string
;
3393 CHECK_STRING (string
, 1);
3394 proc
= get_process (process
);
3395 send_process (proc
, XSTRING (string
)->data
,
3396 STRING_BYTES (XSTRING (string
)), string
);
3400 /* send a signal number SIGNO to PROCESS.
3401 CURRENT_GROUP means send to the process group that currently owns
3402 the terminal being used to communicate with PROCESS.
3403 This is used for various commands in shell mode.
3404 If NOMSG is zero, insert signal-announcements into process's buffers
3407 If we can, we try to signal PROCESS by sending control characters
3408 down the pty. This allows us to signal inferiors who have changed
3409 their uid, for which killpg would return an EPERM error. */
3412 process_send_signal (process
, signo
, current_group
, nomsg
)
3413 Lisp_Object process
;
3415 Lisp_Object current_group
;
3419 register struct Lisp_Process
*p
;
3423 proc
= get_process (process
);
3424 p
= XPROCESS (proc
);
3426 if (!EQ (p
->childp
, Qt
))
3427 error ("Process %s is not a subprocess",
3428 XSTRING (p
->name
)->data
);
3429 if (XINT (p
->infd
) < 0)
3430 error ("Process %s is not active",
3431 XSTRING (p
->name
)->data
);
3433 if (NILP (p
->pty_flag
))
3434 current_group
= Qnil
;
3436 /* If we are using pgrps, get a pgrp number and make it negative. */
3437 if (!NILP (current_group
))
3439 #ifdef SIGNALS_VIA_CHARACTERS
3440 /* If possible, send signals to the entire pgrp
3441 by sending an input character to it. */
3443 /* TERMIOS is the latest and bestest, and seems most likely to
3444 work. If the system has it, use it. */
3451 tcgetattr (XINT (p
->infd
), &t
);
3452 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3456 tcgetattr (XINT (p
->infd
), &t
);
3457 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3461 tcgetattr (XINT (p
->infd
), &t
);
3462 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
3463 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3465 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
3470 #else /* ! HAVE_TERMIOS */
3472 /* On Berkeley descendants, the following IOCTL's retrieve the
3473 current control characters. */
3474 #if defined (TIOCGLTC) && defined (TIOCGETC)
3482 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3483 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
3486 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3487 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
3491 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
3492 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
3494 #endif /* ! defined (SIGTSTP) */
3497 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3499 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
3506 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3507 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3510 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3511 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3515 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3516 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3518 #endif /* ! defined (SIGTSTP) */
3520 #else /* ! defined (TCGETA) */
3521 Your configuration files are messed up
.
3522 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
3523 you'd better be using one of the alternatives above! */
3524 #endif /* ! defined (TCGETA) */
3525 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3526 #endif /* ! defined HAVE_TERMIOS */
3527 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
3530 /* Get the pgrp using the tty itself, if we have that.
3531 Otherwise, use the pty to get the pgrp.
3532 On pfa systems, saka@pfu.fujitsu.co.JP writes:
3533 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
3534 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
3535 His patch indicates that if TIOCGPGRP returns an error, then
3536 we should just assume that p->pid is also the process group id. */
3540 if (!NILP (p
->subtty
))
3541 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
3543 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
3547 gid
= - XFASTINT (p
->pid
);
3548 #endif /* ! defined (pfa) */
3554 #else /* ! defined (TIOCGPGRP ) */
3555 /* Can't select pgrps on this system, so we know that
3556 the child itself heads the pgrp. */
3557 gid
= - XFASTINT (p
->pid
);
3558 #endif /* ! defined (TIOCGPGRP ) */
3561 gid
= - XFASTINT (p
->pid
);
3567 p
->raw_status_low
= Qnil
;
3568 p
->raw_status_high
= Qnil
;
3570 XSETINT (p
->tick
, ++process_tick
);
3574 #endif /* ! defined (SIGCONT) */
3577 send_process (proc
, "\003", 1, Qnil
); /* ^C */
3582 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
3587 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
3590 flush_pending_output (XINT (p
->infd
));
3594 /* If we don't have process groups, send the signal to the immediate
3595 subprocess. That isn't really right, but it's better than any
3596 obvious alternative. */
3599 kill (XFASTINT (p
->pid
), signo
);
3603 /* gid may be a pid, or minus a pgrp's number */
3605 if (!NILP (current_group
))
3606 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
3609 gid
= - XFASTINT (p
->pid
);
3612 #else /* ! defined (TIOCSIGSEND) */
3613 EMACS_KILLPG (-gid
, signo
);
3614 #endif /* ! defined (TIOCSIGSEND) */
3617 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
3618 "Interrupt process PROCESS. May be process or name of one.\n\
3619 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
3620 nil or no arg means current buffer's process.\n\
3621 Second arg CURRENT-GROUP non-nil means send signal to\n\
3622 the current process-group of the process's controlling terminal\n\
3623 rather than to the process's own process group.\n\
3624 If the process is a shell, this means interrupt current subjob\n\
3625 rather than the shell.")
3626 (process
, current_group
)
3627 Lisp_Object process
, current_group
;
3629 process_send_signal (process
, SIGINT
, current_group
, 0);
3633 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
3634 "Kill process PROCESS. May be process or name of one.\n\
3635 See function `interrupt-process' for more details on usage.")
3636 (process
, current_group
)
3637 Lisp_Object process
, current_group
;
3639 process_send_signal (process
, SIGKILL
, current_group
, 0);
3643 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
3644 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
3645 See function `interrupt-process' for more details on usage.")
3646 (process
, current_group
)
3647 Lisp_Object process
, current_group
;
3649 process_send_signal (process
, SIGQUIT
, current_group
, 0);
3653 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3654 "Stop process PROCESS. May be process or name of one.\n\
3655 See function `interrupt-process' for more details on usage.")
3656 (process
, current_group
)
3657 Lisp_Object process
, current_group
;
3660 error ("no SIGTSTP support");
3662 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3667 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3668 "Continue process PROCESS. May be process or name of one.\n\
3669 See function `interrupt-process' for more details on usage.")
3670 (process
, current_group
)
3671 Lisp_Object process
, current_group
;
3674 process_send_signal (process
, SIGCONT
, current_group
, 0);
3676 error ("no SIGCONT support");
3681 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3682 2, 2, "nProcess number: \nnSignal code: ",
3683 "Send the process with process id PID the signal with code SIGCODE.\n\
3684 PID must be an integer. The process need not be a child of this Emacs.\n\
3685 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3687 Lisp_Object pid
, sigcode
;
3689 CHECK_NUMBER (pid
, 0);
3691 #define handle_signal(NAME, VALUE) \
3692 else if (!strcmp (name, NAME)) \
3693 XSETINT (sigcode, VALUE)
3695 if (INTEGERP (sigcode
))
3699 unsigned char *name
;
3701 CHECK_SYMBOL (sigcode
, 1);
3702 name
= XSYMBOL (sigcode
)->name
->data
;
3707 handle_signal ("SIGHUP", SIGHUP
);
3710 handle_signal ("SIGINT", SIGINT
);
3713 handle_signal ("SIGQUIT", SIGQUIT
);
3716 handle_signal ("SIGILL", SIGILL
);
3719 handle_signal ("SIGABRT", SIGABRT
);
3722 handle_signal ("SIGEMT", SIGEMT
);
3725 handle_signal ("SIGKILL", SIGKILL
);
3728 handle_signal ("SIGFPE", SIGFPE
);
3731 handle_signal ("SIGBUS", SIGBUS
);
3734 handle_signal ("SIGSEGV", SIGSEGV
);
3737 handle_signal ("SIGSYS", SIGSYS
);
3740 handle_signal ("SIGPIPE", SIGPIPE
);
3743 handle_signal ("SIGALRM", SIGALRM
);
3746 handle_signal ("SIGTERM", SIGTERM
);
3749 handle_signal ("SIGURG", SIGURG
);
3752 handle_signal ("SIGSTOP", SIGSTOP
);
3755 handle_signal ("SIGTSTP", SIGTSTP
);
3758 handle_signal ("SIGCONT", SIGCONT
);
3761 handle_signal ("SIGCHLD", SIGCHLD
);
3764 handle_signal ("SIGTTIN", SIGTTIN
);
3767 handle_signal ("SIGTTOU", SIGTTOU
);
3770 handle_signal ("SIGIO", SIGIO
);
3773 handle_signal ("SIGXCPU", SIGXCPU
);
3776 handle_signal ("SIGXFSZ", SIGXFSZ
);
3779 handle_signal ("SIGVTALRM", SIGVTALRM
);
3782 handle_signal ("SIGPROF", SIGPROF
);
3785 handle_signal ("SIGWINCH", SIGWINCH
);
3788 handle_signal ("SIGINFO", SIGINFO
);
3791 handle_signal ("SIGUSR1", SIGUSR1
);
3794 handle_signal ("SIGUSR2", SIGUSR2
);
3797 error ("Undefined signal name %s", name
);
3800 #undef handle_signal
3802 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3805 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3806 "Make PROCESS see end-of-file in its input.\n\
3807 Eof comes after any text already sent to it.\n\
3808 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3809 nil, indicating the current buffer's process.\n\
3810 If PROCESS is a network connection, or is a process communicating\n\
3811 through a pipe (as opposed to a pty), then you cannot send any more\n\
3812 text to PROCESS after you call this function.")
3814 Lisp_Object process
;
3818 proc
= get_process (process
);
3820 /* Make sure the process is really alive. */
3821 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3822 update_status (XPROCESS (proc
));
3823 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3824 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3827 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3829 if (!NILP (XPROCESS (proc
)->pty_flag
))
3830 send_process (proc
, "\004", 1, Qnil
);
3833 #ifdef HAVE_SHUTDOWN
3834 /* If this is a network connection, or socketpair is used
3835 for communication with the subprocess, call shutdown to cause EOF.
3836 (In some old system, shutdown to socketpair doesn't work.
3837 Then we just can't win.) */
3838 if (NILP (XPROCESS (proc
)->pid
)
3839 || XINT (XPROCESS (proc
)->outfd
) == XINT (XPROCESS (proc
)->infd
))
3840 shutdown (XINT (XPROCESS (proc
)->outfd
), 1);
3841 /* In case of socketpair, outfd == infd, so don't close it. */
3842 if (XINT (XPROCESS (proc
)->outfd
) != XINT (XPROCESS (proc
)->infd
))
3843 close (XINT (XPROCESS (proc
)->outfd
));
3844 #else /* not HAVE_SHUTDOWN */
3845 close (XINT (XPROCESS (proc
)->outfd
));
3846 #endif /* not HAVE_SHUTDOWN */
3847 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3853 /* Kill all processes associated with `buffer'.
3854 If `buffer' is nil, kill all processes */
3857 kill_buffer_processes (buffer
)
3860 Lisp_Object tail
, proc
;
3862 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3864 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3865 if (GC_PROCESSP (proc
)
3866 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3868 if (NETCONN_P (proc
))
3869 Fdelete_process (proc
);
3870 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3871 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3876 /* On receipt of a signal that a child status has changed,
3877 loop asking about children with changed statuses until
3878 the system says there are no more.
3879 All we do is change the status;
3880 we do not run sentinels or print notifications.
3881 That is saved for the next time keyboard input is done,
3882 in order to avoid timing errors. */
3884 /** WARNING: this can be called during garbage collection.
3885 Therefore, it must not be fooled by the presence of mark bits in
3888 /** USG WARNING: Although it is not obvious from the documentation
3889 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3890 signal() before executing at least one wait(), otherwise the handler
3891 will be called again, resulting in an infinite loop. The relevant
3892 portion of the documentation reads "SIGCLD signals will be queued
3893 and the signal-catching function will be continually reentered until
3894 the queue is empty". Invoking signal() causes the kernel to reexamine
3895 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3898 sigchld_handler (signo
)
3901 int old_errno
= errno
;
3903 register struct Lisp_Process
*p
;
3904 extern EMACS_TIME
*input_available_clear_time
;
3908 sigheld
|= sigbit (SIGCHLD
);
3920 #endif /* no WUNTRACED */
3921 /* Keep trying to get a status until we get a definitive result. */
3925 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3927 while (pid
<= 0 && errno
== EINTR
);
3931 /* A real failure. We have done all our job, so return. */
3933 /* USG systems forget handlers when they are used;
3934 must reestablish each time */
3935 #if defined (USG) && !defined (POSIX_SIGNALS)
3936 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3939 sigheld
&= ~sigbit (SIGCHLD
);
3947 #endif /* no WNOHANG */
3949 /* Find the process that signaled us, and record its status. */
3952 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3954 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3955 p
= XPROCESS (proc
);
3956 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3961 /* Look for an asynchronous process whose pid hasn't been filled
3964 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3966 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3967 p
= XPROCESS (proc
);
3968 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3973 /* Change the status of the process that was found. */
3976 union { int i
; WAITTYPE wt
; } u
;
3977 int clear_desc_flag
= 0;
3979 XSETINT (p
->tick
, ++process_tick
);
3981 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3982 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3984 /* If process has terminated, stop waiting for its output. */
3985 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3986 && XINT (p
->infd
) >= 0)
3987 clear_desc_flag
= 1;
3989 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3990 if (clear_desc_flag
)
3992 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3993 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3996 /* Tell wait_reading_process_input that it needs to wake up and
3998 if (input_available_clear_time
)
3999 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
4002 /* There was no asynchronous process found for that id. Check
4003 if we have a synchronous process. */
4006 synch_process_alive
= 0;
4008 /* Report the status of the synchronous process. */
4010 synch_process_retcode
= WRETCODE (w
);
4011 else if (WIFSIGNALED (w
))
4013 int code
= WTERMSIG (w
);
4019 /* Suppress warning if the table has const char *. */
4020 signame
= (char *) sys_siglist
[code
];
4022 signame
= sys_errlist
[code
];
4026 signame
= "unknown";
4028 synch_process_death
= signame
;
4031 /* Tell wait_reading_process_input that it needs to wake up and
4033 if (input_available_clear_time
)
4034 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
4037 /* On some systems, we must return right away.
4038 If any more processes want to signal us, we will
4040 Otherwise (on systems that have WNOHANG), loop around
4041 to use up all the processes that have something to tell us. */
4042 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
4043 #if defined (USG) && ! defined (POSIX_SIGNALS)
4044 signal (signo
, sigchld_handler
);
4048 #endif /* USG, but not HPUX with WNOHANG */
4054 exec_sentinel_unwind (data
)
4057 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
4062 exec_sentinel_error_handler (error
)
4065 cmd_error_internal (error
, "error in process sentinel: ");
4067 update_echo_area ();
4068 Fsleep_for (make_number (2), Qnil
);
4072 exec_sentinel (proc
, reason
)
4073 Lisp_Object proc
, reason
;
4075 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
4076 register struct Lisp_Process
*p
= XPROCESS (proc
);
4077 int count
= specpdl_ptr
- specpdl
;
4078 int outer_running_asynch_code
= running_asynch_code
;
4080 /* No need to gcpro these, because all we do with them later
4081 is test them for EQness, and none of them should be a string. */
4082 odeactivate
= Vdeactivate_mark
;
4083 XSETBUFFER (obuffer
, current_buffer
);
4084 okeymap
= current_buffer
->keymap
;
4086 sentinel
= p
->sentinel
;
4087 if (NILP (sentinel
))
4090 /* Zilch the sentinel while it's running, to avoid recursive invocations;
4091 assure that it gets restored no matter how the sentinel exits. */
4093 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
4094 /* Inhibit quit so that random quits don't screw up a running filter. */
4095 specbind (Qinhibit_quit
, Qt
);
4096 specbind (Qlast_nonmenu_event
, Qt
);
4098 /* In case we get recursively called,
4099 and we already saved the match data nonrecursively,
4100 save the same match data in safely recursive fashion. */
4101 if (outer_running_asynch_code
)
4104 tem
= Fmatch_data (Qnil
, Qnil
);
4105 restore_match_data ();
4106 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
4107 Fset_match_data (tem
);
4110 /* For speed, if a search happens within this code,
4111 save the match data in a special nonrecursive fashion. */
4112 running_asynch_code
= 1;
4114 internal_condition_case_1 (read_process_output_call
,
4116 Fcons (proc
, Fcons (reason
, Qnil
))),
4117 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
4118 exec_sentinel_error_handler
);
4120 /* If we saved the match data nonrecursively, restore it now. */
4121 restore_match_data ();
4122 running_asynch_code
= outer_running_asynch_code
;
4124 Vdeactivate_mark
= odeactivate
;
4126 if (! EQ (Fcurrent_buffer (), obuffer
)
4127 || ! EQ (current_buffer
->keymap
, okeymap
))
4129 /* But do it only if the caller is actually going to read events.
4130 Otherwise there's no need to make him wake up, and it could
4131 cause trouble (for example it would make Fsit_for return). */
4132 if (waiting_for_user_input_p
== -1)
4133 record_asynch_buffer_change ();
4135 unbind_to (count
, Qnil
);
4138 /* Report all recent events of a change in process status
4139 (either run the sentinel or output a message).
4140 This is done while Emacs is waiting for keyboard input. */
4145 register Lisp_Object proc
, buffer
;
4146 Lisp_Object tail
, msg
;
4147 struct gcpro gcpro1
, gcpro2
;
4151 /* We need to gcpro tail; if read_process_output calls a filter
4152 which deletes a process and removes the cons to which tail points
4153 from Vprocess_alist, and then causes a GC, tail is an unprotected
4157 /* Set this now, so that if new processes are created by sentinels
4158 that we run, we get called again to handle their status changes. */
4159 update_tick
= process_tick
;
4161 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
4164 register struct Lisp_Process
*p
;
4166 proc
= Fcdr (Fcar (tail
));
4167 p
= XPROCESS (proc
);
4169 if (XINT (p
->tick
) != XINT (p
->update_tick
))
4171 XSETINT (p
->update_tick
, XINT (p
->tick
));
4173 /* If process is still active, read any output that remains. */
4174 while (! EQ (p
->filter
, Qt
)
4175 && XINT (p
->infd
) >= 0
4176 && read_process_output (proc
, XINT (p
->infd
)) > 0);
4180 /* Get the text to use for the message. */
4181 if (!NILP (p
->raw_status_low
))
4183 msg
= status_message (p
->status
);
4185 /* If process is terminated, deactivate it or delete it. */
4187 if (CONSP (p
->status
))
4188 symbol
= XCONS (p
->status
)->car
;
4190 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
4191 || EQ (symbol
, Qclosed
))
4193 if (delete_exited_processes
)
4194 remove_process (proc
);
4196 deactivate_process (proc
);
4199 /* The actions above may have further incremented p->tick.
4200 So set p->update_tick again
4201 so that an error in the sentinel will not cause
4202 this code to be run again. */
4203 XSETINT (p
->update_tick
, XINT (p
->tick
));
4204 /* Now output the message suitably. */
4205 if (!NILP (p
->sentinel
))
4206 exec_sentinel (proc
, msg
);
4207 /* Don't bother with a message in the buffer
4208 when a process becomes runnable. */
4209 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
4211 Lisp_Object ro
, tem
;
4212 struct buffer
*old
= current_buffer
;
4213 int opoint
, opoint_byte
;
4214 int before
, before_byte
;
4216 ro
= XBUFFER (buffer
)->read_only
;
4218 /* Avoid error if buffer is deleted
4219 (probably that's why the process is dead, too) */
4220 if (NILP (XBUFFER (buffer
)->name
))
4222 Fset_buffer (buffer
);
4225 opoint_byte
= PT_BYTE
;
4226 /* Insert new output into buffer
4227 at the current end-of-output marker,
4228 thus preserving logical ordering of input and output. */
4229 if (XMARKER (p
->mark
)->buffer
)
4230 Fgoto_char (p
->mark
);
4232 SET_PT_BOTH (ZV
, ZV_BYTE
);
4235 before_byte
= PT_BYTE
;
4237 tem
= current_buffer
->read_only
;
4238 current_buffer
->read_only
= Qnil
;
4239 insert_string ("\nProcess ");
4240 Finsert (1, &p
->name
);
4241 insert_string (" ");
4243 current_buffer
->read_only
= tem
;
4244 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
4246 if (opoint
>= before
)
4247 SET_PT_BOTH (opoint
+ (PT
- before
),
4248 opoint_byte
+ (PT_BYTE
- before_byte
));
4250 SET_PT_BOTH (opoint
, opoint_byte
);
4252 set_buffer_internal (old
);
4257 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
4258 redisplay_preserve_echo_area ();
4264 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
4265 Sset_process_coding_system
, 1, 3, 0,
4266 "Set coding systems of PROCESS to DECODING (input from the process) and\n\
4267 ENCODING (output to the process).")
4268 (proc
, decoding
, encoding
)
4269 register Lisp_Object proc
, decoding
, encoding
;
4271 register struct Lisp_Process
*p
;
4273 CHECK_PROCESS (proc
, 0);
4274 p
= XPROCESS (proc
);
4275 if (XINT (p
->infd
) < 0)
4276 error ("Input file descriptor of %s closed", XSTRING (p
->name
)->data
);
4277 if (XINT (p
->outfd
) < 0)
4278 error ("Output file descriptor of %s closed", XSTRING (p
->name
)->data
);
4280 p
->decode_coding_system
= Fcheck_coding_system (decoding
);
4281 p
->encode_coding_system
= Fcheck_coding_system (encoding
);
4282 setup_coding_system (decoding
,
4283 proc_decode_coding_system
[XINT (p
->infd
)]);
4284 setup_coding_system (encoding
,
4285 proc_encode_coding_system
[XINT (p
->outfd
)]);
4290 DEFUN ("process-coding-system",
4291 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
4292 "Return a cons of coding systems for decoding and encoding of PROCESS.")
4294 register Lisp_Object proc
;
4296 CHECK_PROCESS (proc
, 0);
4297 return Fcons (XPROCESS (proc
)->decode_coding_system
,
4298 XPROCESS (proc
)->encode_coding_system
);
4301 /* The first time this is called, assume keyboard input comes from DESC
4302 instead of from where we used to expect it.
4303 Subsequent calls mean assume input keyboard can come from DESC
4304 in addition to other places. */
4306 static int add_keyboard_wait_descriptor_called_flag
;
4309 add_keyboard_wait_descriptor (desc
)
4312 if (! add_keyboard_wait_descriptor_called_flag
)
4313 FD_CLR (0, &input_wait_mask
);
4314 add_keyboard_wait_descriptor_called_flag
= 1;
4315 FD_SET (desc
, &input_wait_mask
);
4316 FD_SET (desc
, &non_process_wait_mask
);
4317 if (desc
> max_keyboard_desc
)
4318 max_keyboard_desc
= desc
;
4321 /* From now on, do not expect DESC to give keyboard input. */
4324 delete_keyboard_wait_descriptor (desc
)
4328 int lim
= max_keyboard_desc
;
4330 FD_CLR (desc
, &input_wait_mask
);
4331 FD_CLR (desc
, &non_process_wait_mask
);
4333 if (desc
== max_keyboard_desc
)
4334 for (fd
= 0; fd
< lim
; fd
++)
4335 if (FD_ISSET (fd
, &input_wait_mask
)
4336 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4337 max_keyboard_desc
= fd
;
4340 /* Return nonzero if *MASK has a bit set
4341 that corresponds to one of the keyboard input descriptors. */
4344 keyboard_bit_set (mask
)
4349 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
4350 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
4351 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4364 if (! noninteractive
|| initialized
)
4366 signal (SIGCHLD
, sigchld_handler
);
4369 FD_ZERO (&input_wait_mask
);
4370 FD_ZERO (&non_keyboard_wait_mask
);
4371 FD_ZERO (&non_process_wait_mask
);
4372 max_process_desc
= 0;
4374 FD_SET (0, &input_wait_mask
);
4376 Vprocess_alist
= Qnil
;
4377 for (i
= 0; i
< MAXDESC
; i
++)
4379 chan_process
[i
] = Qnil
;
4380 proc_buffered_char
[i
] = -1;
4382 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
4383 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
4389 Qprocessp
= intern ("processp");
4390 staticpro (&Qprocessp
);
4391 Qrun
= intern ("run");
4393 Qstop
= intern ("stop");
4395 Qsignal
= intern ("signal");
4396 staticpro (&Qsignal
);
4398 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
4401 Qexit = intern ("exit");
4402 staticpro (&Qexit); */
4404 Qopen
= intern ("open");
4406 Qclosed
= intern ("closed");
4407 staticpro (&Qclosed
);
4409 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
4410 staticpro (&Qlast_nonmenu_event
);
4412 staticpro (&Vprocess_alist
);
4414 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
4415 "*Non-nil means delete processes immediately when they exit.\n\
4416 nil means don't delete them until `list-processes' is run.");
4418 delete_exited_processes
= 1;
4420 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
4421 "Control type of device used to communicate with subprocesses.\n\
4422 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
4423 The value has no effect if the system has no ptys or if all ptys are busy:\n\
4424 then a pipe is used in any case.\n\
4425 The value takes effect when `start-process' is called.");
4426 Vprocess_connection_type
= Qt
;
4428 defsubr (&Sprocessp
);
4429 defsubr (&Sget_process
);
4430 defsubr (&Sget_buffer_process
);
4431 defsubr (&Sdelete_process
);
4432 defsubr (&Sprocess_status
);
4433 defsubr (&Sprocess_exit_status
);
4434 defsubr (&Sprocess_id
);
4435 defsubr (&Sprocess_name
);
4436 defsubr (&Sprocess_tty_name
);
4437 defsubr (&Sprocess_command
);
4438 defsubr (&Sset_process_buffer
);
4439 defsubr (&Sprocess_buffer
);
4440 defsubr (&Sprocess_mark
);
4441 defsubr (&Sset_process_filter
);
4442 defsubr (&Sprocess_filter
);
4443 defsubr (&Sset_process_sentinel
);
4444 defsubr (&Sprocess_sentinel
);
4445 defsubr (&Sset_process_window_size
);
4446 defsubr (&Sset_process_inherit_coding_system_flag
);
4447 defsubr (&Sprocess_inherit_coding_system_flag
);
4448 defsubr (&Sprocess_kill_without_query
);
4449 defsubr (&Sprocess_contact
);
4450 defsubr (&Slist_processes
);
4451 defsubr (&Sprocess_list
);
4452 defsubr (&Sstart_process
);
4454 defsubr (&Sopen_network_stream
);
4455 #endif /* HAVE_SOCKETS */
4456 defsubr (&Saccept_process_output
);
4457 defsubr (&Sprocess_send_region
);
4458 defsubr (&Sprocess_send_string
);
4459 defsubr (&Sinterrupt_process
);
4460 defsubr (&Skill_process
);
4461 defsubr (&Squit_process
);
4462 defsubr (&Sstop_process
);
4463 defsubr (&Scontinue_process
);
4464 defsubr (&Sprocess_send_eof
);
4465 defsubr (&Ssignal_process
);
4466 defsubr (&Swaiting_for_user_input_p
);
4467 /* defsubr (&Sprocess_connection); */
4468 defsubr (&Sset_process_coding_system
);
4469 defsubr (&Sprocess_coding_system
);
4473 #else /* not subprocesses */
4475 #include <sys/types.h>
4479 #include "systime.h"
4480 #include "charset.h"
4482 #include "termopts.h"
4483 #include "sysselect.h"
4485 extern int frame_garbaged
;
4487 extern EMACS_TIME
timer_check ();
4488 extern int timers_run
;
4490 /* As described above, except assuming that there are no subprocesses:
4492 Wait for timeout to elapse and/or keyboard input to be available.
4495 timeout in seconds, or
4496 zero for no limit, or
4497 -1 means gobble data immediately available but don't wait for any.
4499 read_kbd is a Lisp_Object:
4500 0 to ignore keyboard input, or
4501 1 to return when input is available, or
4502 -1 means caller will actually read the input, so don't throw to
4504 a cons cell, meaning wait until its car is non-nil
4505 (and gobble terminal input into the buffer if any arrives), or
4506 We know that read_kbd will never be a Lisp_Process, since
4507 `subprocesses' isn't defined.
4509 do_display != 0 means redisplay should be done to show subprocess
4510 output that arrives.
4512 Return true iff we received input from any process. */
4515 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
4516 int time_limit
, microsecs
;
4517 Lisp_Object read_kbd
;
4520 EMACS_TIME end_time
, timeout
;
4521 SELECT_TYPE waitchannels
;
4523 Lisp_Object
*wait_for_cell
= 0;
4525 /* If waiting for non-nil in a cell, record where. */
4526 if (CONSP (read_kbd
))
4528 wait_for_cell
= &XCONS (read_kbd
)->car
;
4529 XSETFASTINT (read_kbd
, 0);
4532 /* What does time_limit really mean? */
4533 if (time_limit
|| microsecs
)
4535 if (time_limit
== -1)
4536 /* In fact, it's zero. */
4537 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4539 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4541 /* How far in the future is that? */
4542 EMACS_GET_TIME (end_time
);
4543 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4546 /* It's infinite. */
4547 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4549 /* Turn off periodic alarms (in case they are in use)
4550 because the select emulator uses alarms. */
4556 int timeout_reduced_for_timers
= 0;
4558 /* If calling from keyboard input, do not quit
4559 since we want to return C-g as an input character.
4560 Otherwise, do pending quit if requested. */
4561 if (XINT (read_kbd
) >= 0)
4564 /* Exit now if the cell we're waiting for became non-nil. */
4565 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4568 /* Compute time from now till when time limit is up */
4569 /* Exit if already run out */
4570 if (time_limit
> 0 || microsecs
)
4572 EMACS_GET_TIME (timeout
);
4573 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4574 if (EMACS_TIME_NEG_P (timeout
))
4578 /* If our caller will not immediately handle keyboard events,
4579 run timer events directly.
4580 (Callers that will immediately read keyboard events
4581 call timer_delay on their own.) */
4582 if (! wait_for_cell
)
4584 EMACS_TIME timer_delay
;
4588 old_timers_run
= timers_run
;
4589 timer_delay
= timer_check (1);
4590 if (timers_run
!= old_timers_run
&& do_display
)
4592 redisplay_preserve_echo_area ();
4593 /* We must retry, since a timer may have requeued itself
4594 and that could alter the time delay. */
4598 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4600 EMACS_TIME difference
;
4601 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4602 if (EMACS_TIME_NEG_P (difference
))
4604 timeout
= timer_delay
;
4605 timeout_reduced_for_timers
= 1;
4610 /* Cause C-g and alarm signals to take immediate action,
4611 and cause input available signals to zero out timeout. */
4612 if (XINT (read_kbd
) < 0)
4613 set_waiting_for_input (&timeout
);
4615 /* Wait till there is something to do. */
4617 if (! XINT (read_kbd
) && wait_for_cell
== 0)
4618 FD_ZERO (&waitchannels
);
4620 FD_SET (0, &waitchannels
);
4622 /* If a frame has been newly mapped and needs updating,
4623 reprocess its display stuff. */
4624 if (frame_garbaged
&& do_display
)
4626 clear_waiting_for_input ();
4627 redisplay_preserve_echo_area ();
4628 if (XINT (read_kbd
) < 0)
4629 set_waiting_for_input (&timeout
);
4632 if (XINT (read_kbd
) && detect_input_pending ())
4635 FD_ZERO (&waitchannels
);
4638 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
4643 /* Make C-g and alarm signals set flags again */
4644 clear_waiting_for_input ();
4646 /* If we woke up due to SIGWINCH, actually change size now. */
4647 do_pending_window_change ();
4649 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4650 /* We waited the full specified time, so return now. */
4655 /* If the system call was interrupted, then go around the
4657 if (xerrno
== EINTR
)
4658 FD_ZERO (&waitchannels
);
4660 error ("select error: %s", strerror (xerrno
));
4663 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
4664 /* System sometimes fails to deliver SIGIO. */
4665 kill (getpid (), SIGIO
);
4668 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
4669 kill (getpid (), SIGIO
);
4672 /* Check for keyboard input */
4674 if ((XINT (read_kbd
) != 0)
4675 && detect_input_pending_run_timers (do_display
))
4677 swallow_events (do_display
);
4678 if (detect_input_pending_run_timers (do_display
))
4682 /* If wait_for_cell. check for keyboard input
4683 but don't run any timers.
4684 ??? (It seems wrong to me to check for keyboard
4685 input at all when wait_for_cell, but the code
4686 has been this way since July 1994.
4687 Try changing this after version 19.31.) */
4689 && detect_input_pending ())
4691 swallow_events (do_display
);
4692 if (detect_input_pending ())
4696 /* Exit now if the cell we're waiting for became non-nil. */
4697 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4707 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
4708 /* Don't confuse make-docfile by having two doc strings for this function.
4709 make-docfile does not pay attention to #if, for good reason! */
4712 register Lisp_Object name
;
4717 DEFUN ("process-inherit-coding-system-flag",
4718 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
4720 /* Don't confuse make-docfile by having two doc strings for this function.
4721 make-docfile does not pay attention to #if, for good reason! */
4724 register Lisp_Object process
;
4726 /* Ignore the argument and return the value of
4727 inherit-process-coding-system. */
4728 return inherit_process_coding_system
? Qt
: Qnil
;
4731 /* Kill all processes associated with `buffer'.
4732 If `buffer' is nil, kill all processes.
4733 Since we have no subprocesses, this does nothing. */
4736 kill_buffer_processes (buffer
)
4747 defsubr (&Sget_buffer_process
);
4748 defsubr (&Sprocess_inherit_coding_system_flag
);
4752 #endif /* not subprocesses */